From rwc at ips.gov.au Wed Apr 1 10:54:38 2020 From: rwc at ips.gov.au (rwc) Date: Wed, 01 Apr 2020 10:54:38 +1100 Subject: [Ips-dsgr] SWS Daily Report - 31 March 20 issued 2354 UT on 31 Mar 2020 Message-ID: <20200331235438.54A8560F8E74@sws-aurora.sws.bom.gov.au> SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/31 MARCH 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 31 MARCH AND FORECAST FOR 01 APRIL - 03 APRIL STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 31 Mar: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 31 Mar: 70/5 1B. SOLAR FORECAST 01 Apr 02 Apr 03 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 70/5 70/5 70/5 COMMENT: Solar activity was Very Low for 31Mar. There is currently one numbered region on the visible disc, region 2759 located at N28E55 is small in size at 20 millionths of the solar hemisphere. No earth-directed CMEs observed in available coronagraph imagery. The solar wind speed ranged between 455km/s and 534km/s over the UT day and is currently 502km/s at the time of this report. The north-south component of interplanetary magnetic field (Bz) ranged between +6nT and -7nT between 00UT-13UT with notable prolonged southward excursions. Bz magnitude has decreased since and is currently fluctuating between +3 and -4nT. Solar wind speeds are expected to be slightly elevated over the next 24 hours due coronal hole effects. Solar activity is expected to be Very Low for the next three days. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 31 Mar: Quiet to Unsettled Estimated Indices 31 Mar : A K Australian Region 8 22322321 Cocos Island 7 12312320 Darwin 8 22322321 Townsville 9 22332321 Learmonth 9 22322331 Alice Springs 8 22322321 Gingin 13 23333332 Canberra 6 12322120 Hobart 10 22333321 Estimated Antarctic Regional K Indices 31 Mar : Macquarie Island 19 23445411 Casey 17 34433332 Mawson 34 55433364 Observed Regional daily pc3 Indices 31 Mar : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 14 (Quiet) Canberra 12 (Quiet) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 31 Mar : A Fredericksburg 13 Planetary 16 Observed AFr/Ap Indices 30 Mar : A K Fredericksburg 8 Planetary 10 1221 2333 2B. MAGNETIC FORECAST Date Ap Conditions 01 Apr 10 Quiet to Unsettled 02 Apr 6 Quiet 03 Apr 6 Quiet COMMENT: Quiet to Unsettled geomagnetic activity observed for the Australian region 31Mar with Antarctic regions experiencing Unsettled to Active conditions with some isolated Minor Storm periods. Quiet to Unsettled geomagnetic conditions expected for the Australian region over the next 24 hours with Unsettled to Active conditions for Antarctic regions. Mostly Quiet conditions for Australian regions and Unsettled to Active conditions for Antarctic regions 02Apr-03Apr. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 31 Mar Normal Normal-fair Fair PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 01 Apr Normal Normal Normal-fair 02 Apr Normal Normal Normal-fair 03 Apr Normal Normal Normal-fair COMMENT: Maximum usable frequencies (MUFs) were mostly near predicted monthly values to slightly enhanced for Low-Mid latitudes 31Mar. Poor ionospheric support for High latitudes. Similar conditions are expected for the next 3 days. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 31 Mar 8 Observed Australian Regional MUFs Cocos Island Region: Enhanced by 15% during local day. Enhanced by 40% during local night. Enhanced by 20% after local dawn. Niue Island Region: Near predicted monthly values. Northern Australian Region: Near predicted monthly values during local day. Enhanced by 25% during local night. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 35% during local night. Antarctic Region (Casey/Scott Base/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Feb -8 Mar -15 Apr -16 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 01 Apr 5 Near to 15% above predicted monthly values 02 Apr 5 Near to 15% above predicted monthly values 03 Apr 5 Near to 15% above predicted monthly values COMMENT: Maximum Usable frequencies (MUFs) ranged from near predicted monthly values to enhanced for Equatorial, Northern AUS and Southern AUS/NZ regions on 31Mar. Notable sporadic E observed again at SWS stations Cocos Is, Darwin, Perth and Learmonth. Disturbed ionospheric support for Antarctic regions. MUFs are expected to range from near predicted monthly values to slightly enhanced for Equatorial, Northern AUS and Southern AUS/NZ region 01Apr-03Apr with disturbed ionospheric support expected for Antarctic regions. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 30 Mar Daily Proton Fluence >1 MeV: 1.2E+05 Daily Proton Fluence >10 MeV: 4.6E+04 Daily Electron Fluence >2 MeV: 7.80E+06 (normal fluence) Electron Fluence Daily Deep Dielectric Discharge Probability: 1% Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: A1.1 DSCOVR Satellite Solar Wind Day Averaged Data for 30 Mar Speed: 403 km/sec Density: 6.9 p/cc Temp: 81000 K Bz: -2 nT (Courtesy Space Weather Prediction Center, Boulder USA) ----------------------------------------------------------- Space Weather Services email: asfc at bom.gov.au Bureau of Meteorology PO Box 1386 WWW: http://www.sws.bom.gov.au Haymarket NSW 1240 AUSTRALIA FTP: ftp://ftp-out.sws.bom.gov.au tel: +61 2 9213 8010 fax: +61 2 9213 8060 IMPORTANT: This e-mail, including any attachments, may contain, confidential or copyright information. The views expressed in this message are those of the individual sender, unless specifically stated to be the views of SWS. If you are not the intended recipient, please contact the sender immediately and delete all copies of this e-mail and attachments. To unsubscribe from an IPS mail list either send an email to "MAIL_LIST"-leave at ips.gov.au or go to http://www.sws.bom.gov.au/mailman/listinfo/"MAIL_LIST". Information about training can be obtained from http://www.sws.bom.gov.au/mailman/listinfo/ips-training. General information is available from http://www.sws.bom.gov.au/mailman/listinfo/ips-info. From rwc at ips.gov.au Thu Apr 2 10:48:36 2020 From: rwc at ips.gov.au (rwc) Date: Thu, 02 Apr 2020 10:48:36 +1100 Subject: [Ips-dsgr] SWS Daily Report - 01 April 20 issued 2348 UT on 01 Apr 2020 Message-ID: <20200401234836.9BC3660C2CC0@sws-aurora.sws.bom.gov.au> SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/01 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 01 APRIL AND FORECAST FOR 02 APRIL - 04 APRIL STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 01 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 01 Apr: 69/3 1B. SOLAR FORECAST 02 Apr 03 Apr 04 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 70/5 70/5 70/5 COMMENT: Solar activity was Very Low for 01Apr. There is currently one numbered region on the visible disc, region 2759 located at N28E40 which has remained quiet and relatively unchanged over the last 24 hours. No earth-directed CMEs observed in available coronagraph imagery. The solar wind speed was ~500km/s at 00UT and gradually declined over the UT day to be 412km/s at the time of this report. The north-south component of interplanetary magnetic field (Bz) ranged between +/-3nT. Solar wind speeds are expected to gradually decline due to the waning influence of the recent negative polarity south polar extension coronal hole. Solar activity is expected to be Very Low for the next three days. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 01 Apr: Quiet Estimated Indices 01 Apr : A K Australian Region 3 12100211 Cocos Island 2 11100111 Darwin 2 12100101 Townsville 4 22110211 Learmonth 4 12110221 Alice Springs 2 12100101 Gingin 2 11100211 Canberra 2 12100100 Hobart 4 12211211 Estimated Antarctic Regional K Indices 01 Apr : Macquarie Island 3 12211110 Casey 10 33411222 Mawson 22 25221355 Observed Regional daily pc3 Indices 01 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 2 (Quiet) Gingin 0 (Quiet) Canberra 0 (Quiet) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 01 Apr : A Fredericksburg 6 Planetary 6 Observed AFr/Ap Indices 31 Mar : A K Fredericksburg 10 Planetary 13 4432 3222 2B. MAGNETIC FORECAST Date Ap Conditions 02 Apr 7 Quiet 03 Apr 6 Quiet 04 Apr 5 Quiet COMMENT: Quiet geomagnetic conditions observed for the Australian region 01Apr with Antarctic regions experiencing Unsettled to Active conditions. Quiet conditions expected for the Australian region over the next 3 days with Quiet to Unsettled conditions for Antarctic regions. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 01 Apr Normal Normal Normal-fair PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 02 Apr Normal Normal Normal-fair 03 Apr Normal Normal Normal-fair 04 Apr Normal Normal Normal-fair COMMENT: Maximum usable frequencies (MUFs) were mostly near predicted monthly values to slightly enhanced for Low-Mid latitudes 01Apr. Periods of disturbed ionospheric support for High latitudes. Similar conditions are expected for the next 3 days. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 01 Apr -1 Observed Australian Regional MUFs Cocos Island Region: Near predicted monthly values during local day. Enhanced by 25% during local night. Enhanced by 20% after local dawn. Niue Island Region: Near predicted monthly values during local day. Enhanced by 15% during local night. Depressed by 20% after local dawn. Northern Australian Region: Near predicted monthly values during local day. Enhanced by 20% during local night. Enhanced by 25% after local dawn. Southern Australian Region: Near predicted monthly values. Antarctic Region (Casey/Scott Base/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 02 Apr 0 Near predicted monthly values 03 Apr 0 Near predicted monthly values 04 Apr 5 Near to 15% above predicted monthly values COMMENT: Maximum Usable frequencies (MUFs) ranged from near predicted monthly values to enhanced for Equatorial, Northern AUS and Southern AUS/NZ regions on 01Apr. Notable sporadic E observed at SWS stations Cocos Is, Darwin, Brisbane and Norfolk Is. Some periods of disturbed ionospheric support for Antarctic regions. MUFs are expected to range from near predicted monthly values to slightly enhanced for Equatorial, Northern AUS and Southern AUS/NZ region for the next 3 days with occasional disturbed periods for Antarctic regions. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 31 Mar Daily Proton Fluence >1 MeV: 9.4E+04 Daily Proton Fluence >10 MeV: 4.6E+04 Daily Electron Fluence >2 MeV: 9.00E+06 (normal fluence) Electron Fluence Daily Deep Dielectric Discharge Probability: 2% Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: A1.2 DSCOVR Satellite Solar Wind Day Averaged Data for 31 Mar Speed: 499 km/sec Density: 9.2 p/cc Temp: 283000 K Bz: 0 nT (Courtesy Space Weather Prediction Center, Boulder USA) ----------------------------------------------------------- Space Weather Services email: asfc at bom.gov.au Bureau of Meteorology PO Box 1386 WWW: http://www.sws.bom.gov.au Haymarket NSW 1240 AUSTRALIA FTP: ftp://ftp-out.sws.bom.gov.au tel: +61 2 9213 8010 fax: +61 2 9213 8060 IMPORTANT: This e-mail, including any attachments, may contain, confidential or copyright information. The views expressed in this message are those of the individual sender, unless specifically stated to be the views of SWS. If you are not the intended recipient, please contact the sender immediately and delete all copies of this e-mail and attachments. To unsubscribe from an IPS mail list either send an email to "MAIL_LIST"-leave at ips.gov.au or go to http://www.sws.bom.gov.au/mailman/listinfo/"MAIL_LIST". Information about training can be obtained from http://www.sws.bom.gov.au/mailman/listinfo/ips-training. General information is available from http://www.sws.bom.gov.au/mailman/listinfo/ips-info. From rwc at ips.gov.au Fri Apr 3 10:49:46 2020 From: rwc at ips.gov.au (rwc) Date: Fri, 03 Apr 2020 10:49:46 +1100 Subject: [Ips-dsgr] SWS Daily Report - 02 April 20 issued 2349 UT on 02 Apr 2020 Message-ID: <20200402234946.6E2CB60F8E74@sws-aurora.sws.bom.gov.au> SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/02 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 02 APRIL AND FORECAST FOR 03 APRIL - 05 APRIL STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 02 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 02 Apr: 69/3 1B. SOLAR FORECAST 03 Apr 04 Apr 05 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 70/5 70/5 70/5 COMMENT: Solar activity was Very Low for 02Apr. There is currently one numbered region on the visible disc, region 2759 located at N28E30 which has remained quiet and relatively unchanged over the last 24 hours. No earth-directed CMEs observed in available coronagraph imagery. The solar wind speed was 411km/s at 00UT, ranged between 400km/s and 450km/s over the UT day and is currently 410km/s at the time of this report. The north-south component of interplanetary magnetic field (Bz) ranged between +4nT and -5nT. Solar wind speed is expected to return to ambient levels over the next 2 days. Possible increase in solar wind speed on 05Apr due to the influence of a equatorial located positive polarity coronal hole that crossed the central meridian on 01Apr. Solar activity is expected to be Very Low for the next three days. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 02 Apr: Quiet Estimated Indices 02 Apr : A K Australian Region 5 12211122 Cocos Island 3 11200112 Darwin 4 12211022 Townsville 5 12221022 Learmonth 4 02210122 Alice Springs 4 11221022 Gingin 4 02121122 Canberra 1 00110011 Hobart 6 13221122 Estimated Antarctic Regional K Indices 02 Apr : Macquarie Island 4 01232011 Casey 12 34321133 Mawson 25 34322265 Observed Regional daily pc3 Indices 02 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 0 (Quiet) Canberra 0 (Quiet) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 02 Apr : A Fredericksburg 7 Planetary 8 Observed AFr/Ap Indices 01 Apr : A K Fredericksburg 4 Planetary 7 2210 1222 2B. MAGNETIC FORECAST Date Ap Conditions 03 Apr 6 Quiet 04 Apr 5 Quiet 05 Apr 11 Unsettled COMMENT: Quiet geomagnetic conditions observed for the Australian region 02Apr with Antarctic regions experiencing Unsettled to Active conditions. Quiet conditions expected for the Australian region over the next 2 days with Quiet to Unsettled conditions for Antarctic regions. Possible increase in geomagnetic activity 05Apr due to coronal hole effects. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 02 Apr Normal Normal Normal-fair PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 03 Apr Normal Normal Normal 04 Apr Normal Normal Normal 05 Apr Normal Normal Normal-fair COMMENT: Maximum usable frequencies (MUFs) were mostly near predicted monthly values to slightly enhanced for Low-Mid latitudes 02Apr. Periods of disturbed ionospheric support for High latitudes. Similar conditions are expected for the next 3 days. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 02 Apr -1 Observed Australian Regional MUFs Cocos Island Region: Enhanced by 45% during local day. Enhanced by 100% during local night. Niue Island Region: Near predicted monthly values. Northern Australian Region: Mostly near predicted monthly values. Enhanced by 20% after local dawn. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 15% during local night. Antarctic Region (Casey/Scott Base/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 03 Apr 0 Near predicted monthly values 04 Apr 0 Near predicted monthly values 05 Apr -10 Near predicted monthly values COMMENT: Maximum Usable frequencies (MUFs) ranged from near predicted monthly values to enhanced for Equatorial, Northern AUS and Southern AUS/NZ regions on 02Apr. Notable sporadic E observed at most SWS stations. Extended periods of disturbed ionospheric support for Antarctic regions. MUFs are expected to range from near predicted monthly values to slightly enhanced for Equatorial, Northern AUS and Southern AUS/NZ region for the next 3 days with notable disturbed periods for Antarctic regions. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 01 Apr Daily Proton Fluence >1 MeV: 5.6E+04 Daily Proton Fluence >10 MeV: 4.6E+04 Daily Electron Fluence >2 MeV: 3.90E+07 (normal fluence) Electron Fluence Daily Deep Dielectric Discharge Probability: 6% Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: A1.4 DSCOVR Satellite Solar Wind Day Averaged Data for 01 Apr Speed: 456 km/sec Density: 7.0 p/cc Temp: 172000 K Bz: 0 nT (Courtesy Space Weather Prediction Center, Boulder USA) ----------------------------------------------------------- Space Weather Services email: asfc at bom.gov.au Bureau of Meteorology PO Box 1386 WWW: http://www.sws.bom.gov.au Haymarket NSW 1240 AUSTRALIA FTP: ftp://ftp-out.sws.bom.gov.au tel: +61 2 9213 8010 fax: +61 2 9213 8060 IMPORTANT: This e-mail, including any attachments, may contain, confidential or copyright information. The views expressed in this message are those of the individual sender, unless specifically stated to be the views of SWS. If you are not the intended recipient, please contact the sender immediately and delete all copies of this e-mail and attachments. To unsubscribe from an IPS mail list either send an email to "MAIL_LIST"-leave at ips.gov.au or go to http://www.sws.bom.gov.au/mailman/listinfo/"MAIL_LIST". Information about training can be obtained from http://www.sws.bom.gov.au/mailman/listinfo/ips-training. General information is available from http://www.sws.bom.gov.au/mailman/listinfo/ips-info. From rwc at ips.gov.au Sat Apr 4 10:31:25 2020 From: rwc at ips.gov.au (Regional Warning Centre) Date: Sat, 04 Apr 2020 10:31:25 +1100 Subject: [Ips-dsgr] SWS Daily Report - 03 April 20 issued 2331 UT on 03 Apr 2020 Message-ID: <20200403233126.08C761FE@sws-nebula.sws> SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/03 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 03 APRIL AND FORECAST FOR 04 APRIL - 06 APRIL STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 03 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 03 Apr: 70/5 1B. SOLAR FORECAST 04 Apr 05 Apr 06 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 70/5 70/5 70/5 COMMENT: Solar activity was very low for 03 Apr. There is currently one numbered region on the visible disc, region 2759 located at N28E17 which has remained quiet and relatively unchanged over the last 24 hours. Solar activity is expected to be very low for the next three days (04-06 Apr).No earth-directed CMEs observed in available coronagraph imagery. The solar wind speed ranged between 400 km/s and 450 km/s during the last 24 hours. The solar wind speed at the time of this report was 430km/s. The total IMF (Bt) ranged from 2 nT to 7 nT and the north-south component of the IMF (Bz) varied in the range -7 nt to +3 nT. Solar wind speed is expected to return to nominal levels today (04 Apr). The solar wind speed are expected to remain at nominal levels on UT day 05-06 Apr. Some mild enhancement in solar wind speed are possible on 05 Apr due to the influence of a small equatorial coronal hole. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 03 Apr: Quiet to Unsettled Estimated Indices 03 Apr : A K Australian Region 5 22011312 Cocos Island 4 21011212 Darwin 5 22011311 Townsville 5 12011322 Learmonth 6 22011322 Alice Springs 4 12001312 Gingin 5 22001322 Canberra 2 11000211 Hobart 4 12001312 Estimated Antarctic Regional K Indices 03 Apr : Macquarie Island 3 01011311 Casey 11 34221223 Mawson 33 54222366 Observed Regional daily pc3 Indices 03 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 0 (Quiet) Canberra 0 (Quiet) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 03 Apr : A Fredericksburg 6 Planetary 8 Observed AFr/Ap Indices 02 Apr : A K Fredericksburg 7 Planetary 8 2221 2223 2B. MAGNETIC FORECAST Date Ap Conditions 04 Apr 5 Quiet 05 Apr 7 Quiet 06 Apr 5 Quiet COMMENT: Quiet to unsettled geomagnetic conditions observed for the Australian region on UT day 03 Apr. The Antarctic sites observed quiet to minor storm levels. Mostly quiet conditions expected for the Australian region over the next 3 days UT days (04-06 Apr). There chance of isolated unsettled periods for 05 Apr due to coronal hole effects. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 03 Apr Normal Normal Normal PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 04 Apr Normal Normal Normal 05 Apr Normal Normal Normal 06 Apr Normal Normal Normal COMMENT: Mostly normal HF propagation conditions are expected for the next three UT days, 04-06 Apr. Mild degradation may happen in high-latitude regions on 06 Apr due to possible increase in geomagnetic activity on 05 Apr. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 03 Apr 1 Observed Australian Regional MUFs Cocos Island Region: Enhanced by 15% during local day. Enhanced by 65% during local night. Niue Island Region: Near predicted monthly values during local day. Enhanced by 15% during local night. Northern Australian Region: Depressed by 20% during local day. Near predicted monthly values during local night. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 20% during local night. Antarctic Region (Casey/Scott Base/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 04 Apr 0 Near predicted monthly values 05 Apr 0 Near predicted monthly values 06 Apr -5 Near predicted monthly values COMMENT: Maximum Usable frequencies (MUFs) were mostly near predicted monthly values to mildly enhanced level over most Australian sites. Mild MUFs depressions were observed in Northern Australian region during local day. Sporadic E observed at some Australian stations. Similar levels of ionospheric support are expected for the next three UT days, 04-06 Apr, for the Australian region. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 02 Apr Daily Proton Fluence >1 MeV: 5.4E+04 Daily Proton Fluence >10 MeV: 4.7E+04 Daily Electron Fluence >2 MeV: 5.20E+07 (normal fluence) Electron Fluence Daily Deep Dielectric Discharge Probability: 7% Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: A1.3 DSCOVR Satellite Solar Wind Day Averaged Data for 02 Apr Speed: 423 km/sec Density: 5.4 p/cc Temp: 83900 K Bz: -1 nT (Courtesy Space Weather Prediction Center, Boulder USA) ----------------------------------------------------------- Space Weather Services email: asfc at bom.gov.au Bureau of Meteorology PO Box 1386 WWW: http://www.sws.bom.gov.au Haymarket NSW 1240 AUSTRALIA FTP: ftp://ftp-out.sws.bom.gov.au tel: +61 2 9213 8010 fax: +61 2 9213 8060 IMPORTANT: This e-mail, including any attachments, may contain, confidential or copyright information. The views expressed in this message are those of the individual sender, unless specifically stated to be the views of SWS. If you are not the intended recipient, please contact the sender immediately and delete all copies of this e-mail and attachments. To unsubscribe from an IPS mail list either send an email to "MAIL_LIST"-leave at ips.gov.au or go to http://www.sws.bom.gov.au/mailman/listinfo/"MAIL_LIST". Information about training can be obtained from http://www.sws.bom.gov.au/mailman/listinfo/ips-training. General information is available from http://www.sws.bom.gov.au/mailman/listinfo/ips-info. From rwc at ips.gov.au Sun Apr 5 09:33:19 2020 From: rwc at ips.gov.au (rwc) Date: Sun, 05 Apr 2020 09:33:19 +1000 Subject: [Ips-dsgr] SWS Daily Report - 04 April 20 issued 2333 UT on 04 Apr 2020 Message-ID: <20200404233319.624EE60C2CC0@sws-aurora.sws.bom.gov.au> SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/04 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 04 APRIL AND FORECAST FOR 05 APRIL - 07 APRIL STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 04 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 04 Apr: 70/5 1B. SOLAR FORECAST 05 Apr 06 Apr 07 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 70/5 70/5 70/5 COMMENT: Solar activity was very low for 04 Apr. There is currently one numbered region on the visible disc, region 2759 located near N28E03 at 04/2300 UT. This regions has produced a few weak B-class flares during the last 24 hours, the strongest B4.2 produced at 04/0052 UT. Solar activity is expected to be very low for the next three UT days (05-07 Apr), with a remote chance of C-class flares. No earth-directed CMEs observed in available coronagraph imagery. During the last 24 hours, the solar wind speed ranged between 410 km/s and 450 km/s, declining in general. The solar wind speed at the time of writing this report was 410km/s. The total IMF (Bt) was mostly steady near 4 nT and the north-south component of the IMF (Bz) varied in the range -3 nT to +4 nT. Solar wind speed is expected to return to mostly nominal levels today (05 Apr). The solar wind speed are expected to remain at nominal levels on UT day 06-07 Apr. Some mild enhancement in solar wind speed are possible due to the influence of a small equatorial coronal hole. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 04 Apr: Quiet Estimated Indices 04 Apr : A K Australian Region 2 21010011 Cocos Island 2 21010010 Darwin 2 21020011 Townsville 1 11010011 Learmonth 2 21100021 Alice Springs 2 21010011 Gingin 2 20010011 Canberra 0 00000000 Hobart 2 21020011 Estimated Antarctic Regional K Indices 04 Apr : Macquarie Island 1 20020000 Casey 6 23320021 Mawson 18 43232145 Observed Regional daily pc3 Indices 04 Apr : Darwin 23 (Quiet to unsettled) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 0 (Quiet) Canberra 8 (Quiet) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 04 Apr : A Fredericksburg 5 Planetary 6 Observed AFr/Ap Indices 03 Apr : A K Fredericksburg 7 Planetary 8 2210 1234 2B. MAGNETIC FORECAST Date Ap Conditions 05 Apr 7 Quiet 06 Apr 5 Quiet 07 Apr 5 Quiet COMMENT: Quiet geomagnetic conditions observed for the Australian region on UT day 04 Apr. The Antarctic sites observed quiet to active levels. Mostly quiet conditions are expected for the Australian region over the next 3 days UT days (05-07 Apr). There is chance of isolated unsettled periods for 05 Apr due to the possible onset of a small equatorial coronal hole effects. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 04 Apr Normal Normal Normal PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 05 Apr Normal Normal Normal 06 Apr Normal Normal Normal 07 Apr Normal Normal Normal COMMENT: Mostly normal HF propagation conditions are expected for the next three UT days, 05-07 Apr. Mild degradation may happen in high-latitude regions on 06 Apr due to a possible increase in geomagnetic activity on 05 Apr. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 04 Apr 3 Observed Australian Regional MUFs Cocos Island Region: Enhanced by 60% during local day. Enhanced by 120% during local night. Enhanced by 20% after local dawn. Niue Island Region: Mostly near predicted monthly values. Northern Australian Region: Near predicted monthly values. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 25% during local night. Antarctic Region (Casey/Scott Base/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 05 Apr 0 Near predicted monthly values 06 Apr -5 Near predicted monthly values 07 Apr 0 Near predicted monthly values COMMENT: Maximum Usable Frequencies (MUFs) were mostly near predicted monthly to mildly enhanced level over most Australian sites on UT day 04 Apr. Sporadic E observed at some Australian stations. Similar levels of ionospheric support are expected for the next three UT days, 05-07 Apr, for the Australian region. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 03 Apr Daily Proton Fluence >1 MeV: 5.9e+04 Daily Proton Fluence >10 MeV: 4.6e+04 Daily Electron Fluence >2 MeV: 2.60e+07 (Normal Fluence) Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/05 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 05 APRIL AND FORECAST FOR 06 APRIL - 08 APRIL STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 05 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 05 Apr: 71/6 1B. SOLAR FORECAST 06 Apr 07 Apr 08 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 70/5 70/5 70/5 COMMENT: Solar activity was very low for 05 Apr, with no flares. There is currently one numbered region on the visible disc, region 2759 located near N28W10 at 05/2300 UT. Solar activity is expected to be very low for the next three UT days (06-08 Apr). No earth-directed CMEs observed in available coronagraph imagery. During the last 24 hours, the solar wind speed ranged between 380 km/s and 440 km/s, declining in general. The solar wind speed at the time of writing this report was 380 km/s. The total IMF (Bt) varied between 2 nT and 8 nT. The north-south component of the IMF (Bz) varied in the range -2 nT to +5 nT. Solar wind speed is expected to remain near its nominal levels for the next 3 UT days (06-08 Apr). ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 05 Apr: Quiet Estimated Indices 05 Apr : A K Australian Region 2 21111100 Cocos Island 1 11110100 Darwin 3 22110101 Townsville 3 22121100 Learmonth 3 21111101 Alice Springs 2 21110100 Gingin 2 20111101 Canberra 1 11110000 Hobart 3 11122100 Estimated Antarctic Regional K Indices 05 Apr : Macquarie Island 1 10111000 Casey 11 44421100 Mawson 13 32222225 Observed Regional daily pc3 Indices 05 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 15 (Quiet) Canberra 17 (Quiet) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 05 Apr : A Fredericksburg 7 Planetary 8 Observed AFr/Ap Indices 04 Apr : A K Fredericksburg 4 Planetary 5 2101 1222 2B. MAGNETIC FORECAST Date Ap Conditions 06 Apr 5 Quiet 07 Apr 5 Quiet 08 Apr 5 Quiet COMMENT: Quiet geomagnetic conditions were observed for the Australian region on UT day 05 Apr. The Antarctic sites observed quiet to unsettled levels. Mostly quiet conditions with isolated unsettled periods are expected for the Australian region over the next 3 days UT days (06-08 Apr). ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 05 Apr Normal Normal Normal PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 06 Apr Normal Normal Normal 07 Apr Normal Normal Normal 08 Apr Normal Normal Normal COMMENT: Mostly normal HF propagation conditions are expected for the next three UT days, 06-08 Apr. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 05 Apr -1 Observed Australian Regional MUFs Cocos Island Region: Near predicted monthly values during local day. Enhanced by 40% during local night. Enhanced by 30% after local dawn. Niue Island Region: Depressed by 15% during local day. Enhanced by 30% during local night. Northern Australian Region: Near predicted monthly values. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 35% during local night. Enhanced by 20% after local dawn. Antarctic Region (Casey/Scott Base/Davis/Mawson): Enhanced by 20% over the UT day. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 06 Apr -5 Near predicted monthly values 07 Apr 0 Near predicted monthly values 08 Apr 0 Near predicted monthly values COMMENT: Maximum Usable Frequencies (MUFs) were mostly near predicted monthly to mildly enhanced level over most Australian sites on UT day 05 Apr. Mild MUFs depressions were observed over Niue island during local day. Sporadic E observed at some Australian stations. Similar levels of ionospheric support are expected for the next three UT days, 06-08 Apr, for the Australian region. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 04 Apr Daily Proton Fluence >1 MeV: 6.0E+04 Daily Proton Fluence >10 MeV: 4.6E+04 Daily Electron Fluence >2 MeV: 1.10E+07 (normal fluence) Electron Fluence Daily Deep Dielectric Discharge Probability: 2% Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: A1.2 DSCOVR Satellite Solar Wind Day Averaged Data for 04 Apr Speed: 432 km/sec Density: 6.1 p/cc Temp: 99400 K Bz: 2 nT (Courtesy Space Weather Prediction Center, Boulder USA) ----------------------------------------------------------- Space Weather Services email: asfc at bom.gov.au Bureau of Meteorology PO Box 1386 WWW: http://www.sws.bom.gov.au Haymarket NSW 1240 AUSTRALIA FTP: ftp://ftp-out.sws.bom.gov.au tel: +61 2 9213 8010 fax: +61 2 9213 8060 IMPORTANT: This e-mail, including any attachments, may contain, confidential or copyright information. The views expressed in this message are those of the individual sender, unless specifically stated to be the views of SWS. If you are not the intended recipient, please contact the sender immediately and delete all copies of this e-mail and attachments. To unsubscribe from an IPS mail list either send an email to "MAIL_LIST"-leave at ips.gov.au or go to http://www.sws.bom.gov.au/mailman/listinfo/"MAIL_LIST". Information about training can be obtained from http://www.sws.bom.gov.au/mailman/listinfo/ips-training. General information is available from http://www.sws.bom.gov.au/mailman/listinfo/ips-info. From rwc at ips.gov.au Tue Apr 7 09:31:25 2020 From: rwc at ips.gov.au (Regional Warning Centre) Date: Tue, 07 Apr 2020 09:31:25 +1000 Subject: [Ips-dsgr] SWS Daily Report - 06 April 20 issued 2331 UT on 06 Apr 2020 Message-ID: <20200406233125.6D86B1DF@sws-nebula.sws> SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/06 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 06 APRIL AND FORECAST FOR 07 APRIL - 09 APRIL STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 06 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 06 Apr: 70/5 1B. SOLAR FORECAST 07 Apr 08 Apr 09 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 70/5 70/5 70/5 COMMENT: Solar activity was Very Low for 06 Apr. There is currently one plage without spot on the visible disk, 2759 (N28,W15), produced few low level B-class events. Very Low levels of solar activity are expected for the next three days,07-09 Apr. No Earth-directed CMEs were observed in the available coronagraph imagery. During the last 24 hours, the solar wind speed was near nominal levels, under 380 km/s. The total IMF (Bt) varied around 3 nT. The north-south component of IMF, Bz, varied mostly between +/2 nT. The solar wind speed is expected to be mostly near its background levels for the next three days, 07-09 Apr, although some slight enhancements may be observed due to weak isolated coronal holes. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 06 Apr: Quiet Estimated Indices 06 Apr : A K Australian Region 0 10001000 Darwin 0 10001000 Townsville 1 11001000 Learmonth 0 20000000 Alice Springs 0 10001000 Gingin 0 10001000 Canberra 0 00000000 Hobart 1 00111000 Estimated Antarctic Regional K Indices 06 Apr : Macquarie Island 0 00101000 Casey 4 23212000 Mawson 3 32111000 Observed Regional daily pc3 Indices 06 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 0 (Quiet) Canberra 0 (Quiet) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 06 Apr : A Fredericksburg 4 Planetary 5 Observed AFr/Ap Indices 05 Apr : A K Fredericksburg 4 Planetary 5 2 1 1 1 2 2 1 1 2B. MAGNETIC FORECAST Date Ap Conditions 07 Apr 5 Quiet 08 Apr 8 Quiet to Unsettled 09 Apr 8 Quiet to Unsettled COMMENT: Quiet geomagnetic conditions were observed for the Australian region on UT day 06 Apr. The Antarctic sites observed Quiet to Unsettled levels. Global geomagnetic activity is expected to be mostly at Quiet levels for the next three days, 07-09 Apr and a times may reach Unsettled levels due to weak coronal hole effects. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 06 Apr Normal Normal Normal PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 07 Apr Normal Normal Normal 08 Apr Normal Normal Normal 09 Apr Normal Normal Normal COMMENT: Mostly normal HF propagation conditions are expected for the next three days, 07-09 Apr. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 06 Apr -0 Observed Australian Regional MUFs Cocos Island Region: Enhanced by 20% during local day. Enhanced by 80% during local night. Niue Island Region: Near predicted monthly values. Northern Australian Region: Near predicted monthly values during local day. Enhanced by 20% during local night. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 20% during local night. Enhanced by 20% after local dawn. Antarctic Region (Casey/Scott Base/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 07 Apr 0 Near predicted monthly values 08 Apr 0 Near predicted monthly values 09 Apr 0 Near predicted monthly values COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values to slightly enhanced for the Australian region on 06 Apr. Moderate MUFs enhancements observed at Cocos Island region local night. Sporadic-E occurrences were seen over some sites. Similar levels of ionospheric support is expected for the next three days, 07-09 Apr. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 05 Apr Daily Proton Fluence >1 MeV: 5.9e+04 Daily Proton Fluence >10 MeV: 4.6e+04 Daily Electron Fluence >2 MeV: 1.10e+07 Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: A1.1 DSCOVR Satellite Solar Wind Day Averaged Data for 05 Apr Speed: 413 km/sec Density: 3.8 p/cc Temp: 53600 K Bz: 0 nT (Courtesy Space Weather Prediction Center, Boulder USA) ----------------------------------------------------------- Space Weather Services email: asfc at bom.gov.au Bureau of Meteorology PO Box 1386 WWW: http://www.sws.bom.gov.au Haymarket NSW 1240 AUSTRALIA FTP: ftp://ftp-out.sws.bom.gov.au tel: +61 2 9213 8010 fax: +61 2 9213 8060 IMPORTANT: This e-mail, including any attachments, may contain, confidential or copyright information. The views expressed in this message are those of the individual sender, unless specifically stated to be the views of SWS. If you are not the intended recipient, please contact the sender immediately and delete all copies of this e-mail and attachments. To unsubscribe from an IPS mail list either send an email to "MAIL_LIST"-leave at ips.gov.au or go to http://www.sws.bom.gov.au/mailman/listinfo/"MAIL_LIST". Information about training can be obtained from http://www.sws.bom.gov.au/mailman/listinfo/ips-training. General information is available from http://www.sws.bom.gov.au/mailman/listinfo/ips-info. From rwc at ips.gov.au Wed Apr 8 09:33:39 2020 From: rwc at ips.gov.au (rwc) Date: Wed, 08 Apr 2020 09:33:39 +1000 Subject: [Ips-dsgr] SWS Daily Report - 07 April 20 issued 2333 UT on 07 Apr 2020 Message-ID: <20200407233339.C42BC60F8E74@sws-aurora.sws.bom.gov.au> SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/07 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 07 APRIL AND FORECAST FOR 08 APRIL - 10 APRIL STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 07 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 07 Apr: 70/5 1B. SOLAR FORECAST 08 Apr 09 Apr 10 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 70/5 70/5 70/5 COMMENT: Solar activity was Very Low for 07 Apr with a B4.5 flare from a plage (Ex region 2579). Very Low levels of solar activity are expected for the next three days, 08-10 Apr. GONG Halpha images showed an unstable filament in the NW quadrant, near the plage. No Earth-directed CMEs were observed in the available coronagraph imagery. During the last 24 hours, the solar wind speed remained near nominal levels, under 340 km/s. The total IMF (Bt) varied between 3 nT and 6 nT. The north-south component of IMF, Bz, was mostly neutral until 07/1400 UT then turned south up to -5 nT. The solar wind speed is expected to be mostly near its background levels for the next three days, 08-10 Apr, although some slight enhancements may be observed due to weak isolated coronal holes. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 07 Apr: Quiet Estimated Indices 07 Apr : A K Australian Region 0 00000011 Darwin 0 00000011 Townsville 1 11100011 Learmonth 2 00001022 Alice Springs 0 00000011 Gingin 1 00000022 Canberra 0 00000001 Hobart 1 10101011 Estimated Antarctic Regional K Indices 07 Apr : Macquarie Island 0 00000000 Casey 6 12311122 Mawson 25 11110175 Observed Regional daily pc3 Indices 07 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 0 (Quiet) Canberra 9 (Quiet) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 07 Apr : A Fredericksburg 2 Planetary 3 Observed AFr/Ap Indices 06 Apr : A K Fredericksburg 2 Planetary 3 1111 1101 2B. MAGNETIC FORECAST Date Ap Conditions 08 Apr 8 Quiet to Unsettled 09 Apr 8 Quiet to Unsettled 10 Apr 8 Quiet to Unsettled COMMENT: Quiet geomagnetic conditions were observed for the Australian region on UT day 07 Apr. Global geomagnetic activity is expected to be mostly at Quiet levels for the next three days, 08-10 Apr and a times may reach Unsettled levels due to weak coronal hole effects. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 07 Apr Normal Normal Normal PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 08 Apr Normal Normal Normal 09 Apr Normal Normal Normal 10 Apr Normal Normal Normal COMMENT: Mostly normal HF propagation conditions are expected for the next three days, 08-10 Apr. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 07 Apr -4 Observed Australian Regional MUFs Cocos Island Region: Enhanced by 15% during local day. Enhanced by 40% during local night. Niue Island Region: Near predicted monthly values. Northern Australian Region: Depressed by 15% during local day. Near predicted monthly values during local night. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 30% during local night. Enhanced by 20% after local dawn. Antarctic Region (Casey/Scott Base/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 08 Apr -5 Near predicted monthly values 09 Apr -5 Near predicted monthly values 10 Apr -5 Near predicted monthly values COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values to slightly enhanced for the Australian region on 07 Apr. Mild MUFs enhancements observed at Cocos Island region local night. Sporadic-E occurrences were seen over some sites. Similar levels of ionospheric support is expected for the next three days, 08-10 Apr. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 06 Apr Daily Proton Fluence >1 MeV: 5.9E+04 Daily Proton Fluence >10 MeV: 4.6E+04 Daily Electron Fluence >2 MeV: 1.20E+07 (normal fluence) Electron Fluence Daily Deep Dielectric Discharge Probability: 2% Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: A1.0 DSCOVR Satellite Solar Wind Day Averaged Data for 06 Apr Speed: 357 km/sec Density: 3.2 p/cc Temp: 30300 K Bz: 0 nT (Courtesy Space Weather Prediction Center, Boulder USA) ----------------------------------------------------------- Space Weather Services email: asfc at bom.gov.au Bureau of Meteorology PO Box 1386 WWW: http://www.sws.bom.gov.au Haymarket NSW 1240 AUSTRALIA FTP: ftp://ftp-out.sws.bom.gov.au tel: +61 2 9213 8010 fax: +61 2 9213 8060 IMPORTANT: This e-mail, including any attachments, may contain, confidential or copyright information. The views expressed in this message are those of the individual sender, unless specifically stated to be the views of SWS. If you are not the intended recipient, please contact the sender immediately and delete all copies of this e-mail and attachments. To unsubscribe from an IPS mail list either send an email to "MAIL_LIST"-leave at ips.gov.au or go to http://www.sws.bom.gov.au/mailman/listinfo/"MAIL_LIST". Information about training can be obtained from http://www.sws.bom.gov.au/mailman/listinfo/ips-training. General information is available from http://www.sws.bom.gov.au/mailman/listinfo/ips-info. From rwc at ips.gov.au Thu Apr 9 09:40:05 2020 From: rwc at ips.gov.au (rwc) Date: Thu, 09 Apr 2020 09:40:05 +1000 Subject: [Ips-dsgr] SWS Daily Report - 08 April 20 issued 2340 UT on 08 Apr 2020 Message-ID: <20200408234005.58F3D60F8E75@sws-aurora.sws.bom.gov.au> SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/08 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 08 APRIL AND FORECAST FOR 09 APRIL - 11 APRIL STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 08 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 08 Apr: 70/5 1B. SOLAR FORECAST 09 Apr 10 Apr 11 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 70/5 70/5 70/5 COMMENT: Solar activity was Very Low for 08 Apr. There are currently no sunspot regions on the visible disk, however there is a plage (Ex region 2579) in the NW quadrant. Very Low levels of solar activity are expected for the next three days, 09-11 Apr. A small filament structure located in the NW quadrant was observed lifting off in GONG H-alpha imagery after 08/0248UT. No CME signature was detected in the available coronagraph imagery. During the last 24 hours, the solar wind speed was slightly elevated, increasing from 320 km/s to 500 km/s, currently near 450 km/s. The total interplanetary magnetic field (Bt) varied between 3 nT and 12 nT and the north-south component of interplanetary magnetic field (Bz) varied in the range +/- 6 nT nT with a southward excursion up to -9 nT early UT day. The solar wind speed is expected to remain slightly enhanced during 09-10 Apr with further enhancement on 11 Apr, due to coronal hole effects. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 08 Apr: Quiet to Active Estimated Indices 08 Apr : A K Australian Region 9 12233322 Darwin 8 12233212 Townsville 10 22233322 Learmonth 14 22234423 Alice Springs 9 12133322 Gingin 12 11224423 Canberra 5 01123212 Hobart 11 12234322 Estimated Antarctic Regional K Indices 08 Apr : Macquarie Island 23 12356421 Casey 18 44433323 Mawson 32 35343536 Observed Regional daily pc3 Indices 08 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 0 (Quiet) Canberra 0 (Quiet) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 08 Apr : A Fredericksburg 12 Planetary 14 Observed AFr/Ap Indices 07 Apr : A K Fredericksburg 3 Planetary 4 0000 1232 2B. MAGNETIC FORECAST Date Ap Conditions 09 Apr 10 Quiet to Unsettled 10 Apr 10 Quiet to Unsettled 11 Apr 15 Quiet to Active COMMENT: Quiet to Active geomagnetic conditions were observed for the Australian region on UT day 08 Apr. The Antarctic region observed some isolated Storm periods. Global geomagnetic activity is expected to be mostly Quiet to Unsettled for 09-11 Apr with possible Active levels due to coronal hole effects. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 08 Apr Normal Normal Normal PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 09 Apr Normal Normal Normal 10 Apr Normal Normal Normal 11 Apr Normal Normal Normal COMMENT: Mostly normal HF propagation conditions are expected for the next three days, 09-11 Apr. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 08 Apr 12 Observed Australian Regional MUFs Cocos Island Region: Enhanced by 40% during local day. Enhanced by 130% during local night. Niue Island Region: Near predicted monthly values during local day. Enhanced by 50% during local night. Northern Australian Region: Near predicted monthly values during local day. Enhanced by 30% during local night. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 40% during local night. Antarctic Region (Casey/Scott Base/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 09 Apr 5 Near to 15% above predicted monthly values 10 Apr 5 Near to 15% above predicted monthly values 11 Apr 5 Near to 15% above predicted monthly values COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values to moderately enhanced for the Australian region on 08 Apr. Strong MUFs enhancements observed at Cocos Island region local night. Sporadic-E occurrences were seen over some sites. Similar levels of ionospheric support is expected for the next three days, 09-11 Apr. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 07 Apr Daily Proton Fluence >1 MeV: 8.0E+04 Daily Proton Fluence >10 MeV: 4.7E+04 Daily Electron Fluence >2 MeV: 1.80E+07 (normal fluence) Electron Fluence Daily Deep Dielectric Discharge Probability: 3% Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/09 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 09 APRIL AND FORECAST FOR 10 APRIL - 12 APRIL STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 09 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 09 Apr: 70/5 1B. SOLAR FORECAST 10 Apr 11 Apr 12 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 70/5 70/5 70/5 COMMENT: Solar activity was Very Low for 09 Apr. There are currently no sunspot regions on the visible disk, however there is a plage (Ex region 2579) in the NW quadrant which produced a low level B-class flare at 0932 UT. No Earth-directed CMEs were observed in the available coronagraph imagery. Very Low levels of solar activity are expected for the next three days, 10-12 Apr. During the last 24 hours, the solar wind speed gradually decreased from 480 Km/s, currently near 350 km/s. The total interplanetary magnetic field (Bt) varied between 2 nT and 5 nT and the north-south component of interplanetary magnetic field (Bz) varied mostly in the range +/-3 nT. The solar wind speed is expected to be near its nominal/background levels today, 10 Apr. On 11-12 Apr, the solar wind is expected to enhance in response to high-speed streams associated with a negative polarity coronal hole. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 09 Apr: Quiet Estimated Indices 09 Apr : A K Australian Region 2 10012010 Darwin 1 10001011 Townsville 2 10012011 Learmonth 2 10022010 Alice Springs 1 10002000 Gingin 2 10012010 Canberra 0 00-01000 Hobart 3 10013111 Estimated Antarctic Regional K Indices 09 Apr : Macquarie Island 1 10012000 Casey 7 23222121 Mawson 18 22132164 Observed Regional daily pc3 Indices 09 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 11 (Quiet) Canberra 0 (Quiet) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 09 Apr : A Fredericksburg 4 Planetary 5 Observed AFr/Ap Indices 08 Apr : A K Fredericksburg 10 Planetary 11 1322 3313 2B. MAGNETIC FORECAST Date Ap Conditions 10 Apr 7 Mostly Quiet 11 Apr 15 Quiet to Active 12 Apr 10 Quiet to Unsettled COMMENT: Geomagnetic activity for 09 Apr was Quiet for the Australian region. The Antarctic region observed mostly Quiet to Unsettled conditions. Global geomagnetic activity is expected to be Quiet to Unsettled for 10-12 Apr with possible Active levels on 11 Apr due to coronal hole effects. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 09 Apr Normal Normal Normal PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 10 Apr Normal Normal Normal 11 Apr Normal Normal-fair Normal-fair 12 Apr Normal Normal-fair Normal-fair COMMENT: Mostly normal HF propagation conditions are expected for the next three days, 10-12 Apr. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 09 Apr -2 Observed Australian Regional MUFs Cocos Island Region: Near predicted monthly values during local day. Enhanced by 40% during local night. Niue Island Region: Near predicted monthly values. Northern Australian Region: Depressed by 15% during local day. Enhanced by 15% during local night. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 30% during local night. Antarctic Region (Casey/Scott Base/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 10 Apr -5 Near predicted monthly values 11 Apr -10 Near predicted monthly values 12 Apr -10 Near predicted monthly values COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values for the Australian region on 09 Apr. Mild MUFs enhancements observed at Cocos Island region local night. Similar levels of ionospheric support is expected for the next three days, 10-12 Apr. Mild MUFs depressions may be observed on 11-12 Apr. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 08 Apr Daily Proton Fluence >1 MeV: 2.7E+05 Daily Proton Fluence >10 MeV: 4.5E+04 Daily Electron Fluence >2 MeV: 1.70E+06 (normal fluence) Electron Fluence Daily Deep Dielectric Discharge Probability: 1% Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/10 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 10 APRIL AND FORECAST FOR 11 APRIL - 13 APRIL STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 10 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 10 Apr: 69/3 1B. SOLAR FORECAST 11 Apr 12 Apr 13 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 69/3 68/2 68/2 COMMENT: Solar activity was very low for UT day, 10 April. There are currently no sunspot regions on the visible disk. No Earth-directed CMEs were observed in the available coronagraph imagery. During the last 24 hours, the solar wind speed varied in the range 350 km/s to 400 km/s, the total interplanetary magnetic field (Bt) varied between 3 nT and 6 nT and the north-south component of interplanetary magnetic field (Bz) varied mostly in the range +4/-4 nT. The solar wind particle density varied in the range of 2 to 6 ppcc through this time. Some enhancements in solar wind parameters may be expected on UT day 11 and 12 April due to coronal hole effects. Very low levels of solar activity are expected for the next three UT days, 11-13 April. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 10 Apr: Quiet Estimated Indices 10 Apr : A K Australian Region 3 01111211 Darwin 4 11211202 Townsville 4 11211211 Learmonth 4 11111310 Alice Springs 3 00111301 Gingin 3 00111310 Canberra 0 00000100 Hobart 4 01121310 Estimated Antarctic Regional K Indices 10 Apr : Macquarie Island 2 00120210 Casey 7 13311311 Mawson 13 32212344 Observed Regional daily pc3 Indices 10 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 0 (Quiet) Canberra 0 (Quiet) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 10 Apr : A Fredericksburg 6 Planetary 6 Observed AFr/Ap Indices 09 Apr : A K Fredericksburg 5 Planetary 4 2011 2102 2B. MAGNETIC FORECAST Date Ap Conditions 11 Apr 15 Mostly quiet to unsettled, some active periods possible 12 Apr 8 Quiet to Unsettled 13 Apr 5 Mostly quiet, some unsettled periods possible COMMENT: Geomagnetic activity in the Australian region stayed mostly at quiet levels with some unsettled periods through UT day, 10 April. Geomagnetic activity in the Antarctic region stayed mostly at quiet to unsettled levels with some active periods through this day. The global geomagnetic activity may vary from quiet to active levels through UT day, 11 April, quiet to unsettled through 12 April and mostly quiet through 13 April. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 10 Apr Normal Normal Normal PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 11 Apr Normal Normal Normal-fair 12 Apr Normal Normal Normal 13 Apr Normal Normal Normal COMMENT: Maximum usable frequencies (MUFs) were mostly near predicted monthly values with periods of minor to significant enhancements on UT day, 10 April. Some periods of minor MUF depressions were also recorded at some low latitude locations. Minor to moderate MUF depressions may be observed on UT day, 11 April. MUFs are expected to stay mostly near the predicted monthly values on UT days 12 and 13 April. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 10 Apr -4 Observed Australian Regional MUFs Cocos Island Region: Near predicted monthly values during local day. Enhanced by 55% during local night. Niue Island Region: Near predicted monthly values during local day. Enhanced by 20% during local night. Northern Australian Region: Depressed by 20% during local day. Enhanced by 15% during local night. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 30% during local night. Antarctic Region (Casey/Scott Base/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 11 Apr -10 Near predicted monthly values 12 Apr -8 Near predicted monthly values 13 Apr -5 Near predicted monthly values COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values with periods of minor to significant enhancements for the Australian region on UT day, 10 April. Some periods of minor MUF depressions were also recorded in the Northern Australian regions. Minor to moderate MUF depressions may be observed on UT day, 11 April. MUFs are expected to stay mostly near the predicted monthly values on UT days 12 and 13 April in this region. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 09 Apr Daily Proton Fluence >1 MeV: 5.4E+04 Daily Proton Fluence >10 MeV: 4.6E+04 Daily Electron Fluence >2 MeV: 2.00E+06 (normal fluence) Electron Fluence Daily Deep Dielectric Discharge Probability: 1% Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: A1.0 DSCOVR Satellite Solar Wind Day Averaged Data for 09 Apr Speed: 402 km/sec Density: 3.0 p/cc Temp: 55500 K Bz: -1 nT (Courtesy Space Weather Prediction Center, Boulder USA) ----------------------------------------------------------- Space Weather Services email: asfc at bom.gov.au Bureau of Meteorology PO Box 1386 WWW: http://www.sws.bom.gov.au Haymarket NSW 1240 AUSTRALIA FTP: ftp://ftp-out.sws.bom.gov.au tel: +61 2 9213 8010 fax: +61 2 9213 8060 IMPORTANT: This e-mail, including any attachments, may contain, confidential or copyright information. The views expressed in this message are those of the individual sender, unless specifically stated to be the views of SWS. If you are not the intended recipient, please contact the sender immediately and delete all copies of this e-mail and attachments. To unsubscribe from an IPS mail list either send an email to "MAIL_LIST"-leave at ips.gov.au or go to http://www.sws.bom.gov.au/mailman/listinfo/"MAIL_LIST". Information about training can be obtained from http://www.sws.bom.gov.au/mailman/listinfo/ips-training. General information is available from http://www.sws.bom.gov.au/mailman/listinfo/ips-info. From rwc at ips.gov.au Sun Apr 12 09:31:32 2020 From: rwc at ips.gov.au (Regional Warning Centre) Date: Sun, 12 Apr 2020 09:31:32 +1000 Subject: [Ips-dsgr] SWS Daily Report - 11 April 20 issued 2331 UT on 11 Apr 2020 Message-ID: <20200411233132.58CA220A@sws-nebula.sws> SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/11 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 11 APRIL AND FORECAST FOR 12 APRIL - 14 APRIL STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 11 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 11 Apr: 71/6 1B. SOLAR FORECAST 12 Apr 13 Apr 14 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 70/5 68/2 68/2 COMMENT: Solar activity was very low for UT day, 11 April. There are currently no sunspot regions on the visible disk. No Earth-directed CMEs were observed in the available coronagraph imagery. During the last 24 hours, the solar wind speed initially decreased from 360 km/s to 330 km/s and then gradually increased to 430 km/s, the total interplanetary magnetic field (Bt) varied between 2 nT and 8 nT. During this day the north-south component of interplanetary magnetic field (Bz) stayed in the range +4/-4 nT by 0730 UT and then varied mostly in the range 0/-7 nT by 2000 UT. Bz stayed slightly positive (in the range 0/+2 nT) after that. The solar wind particle density varied in the range of 2 to 12 ppcc through this time. Some enhancements in solar wind parameters may be possible on UT day 12 April due to coronal hole effects. Very low levels of solar activity are expected for the next three UT days, 12-14 April. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 11 Apr: Quiet to Unsettled Estimated Indices 11 Apr : A K Australian Region 6 10113322 Darwin 6 20113311 Townsville 6 10113322 Learmonth 7 11113322 Alice Springs 6 10113322 Gingin 7 11113322 Canberra 2 00012200 Hobart 6 10113322 Estimated Antarctic Regional K Indices 11 Apr : Macquarie Island 11 00025411 Casey 9 32223222 Mawson 22 32112356 Observed Regional daily pc3 Indices 11 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 0 (Quiet) Canberra 0 (Quiet) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 11 Apr : A Fredericksburg 5 Planetary 6 Observed AFr/Ap Indices 10 Apr : A K Fredericksburg 4 Planetary 5 0112 1312 2B. MAGNETIC FORECAST Date Ap Conditions 12 Apr 8 Quiet to Unsettled 13 Apr 5 Quiet 14 Apr 5 Quiet COMMENT: Geomagnetic activity in the Australian region stayed at quiet to unsettled levels through UT day, 11 April. Geomagnetic activity in the Antarctic region stayed mostly at quiet to unsettled levels with isolated short minor storm periods through this day. The global geomagnetic activity may vary from quiet to unsettled levels through UT day, 12 April. Mostly quiet levels of global geomagnetic activity may be expected for UT days, 13 and 14 April. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 11 Apr Normal Normal Normal PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 12 Apr Normal Normal Normal 13 Apr Normal Normal Normal 14 Apr Normal Normal Normal COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values with periods of minor to significant enhancements on UT day, 11 April. Some periods of minor MUF depressions were also recorded at some low-latitude stations. MUFs are expected to stay mostly near predicted monthly values for the next three UT days, 12 to 14 April. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 11 Apr -2 Observed Australian Regional MUFs Cocos Island Region: Near predicted monthly values during local day. Enhanced by 75% during local night. Northern Australian Region: Depressed by 15% during local day. Enhanced by 20% during local night. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 30% during local night. Antarctic Region (Casey/Scott Base/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 12 Apr -5 Near predicted monthly values 13 Apr -2 Near predicted monthly values 14 Apr -2 Near predicted monthly values COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values with periods of minor to significant enhancements for the Australian region on UT day, 11 April. Some periods of minor MUF depressions were also recorded in the Northern Australian regions. MUFs in the Australian regions are expected to stay mostly near predicted monthly values for the next three UT days, 12 to 14 April. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 10 Apr Daily Proton Fluence >1 MeV: 6.2E+04 Daily Proton Fluence >10 MeV: 4.7E+04 Daily Electron Fluence >2 MeV: 3.80E+06 (normal fluence) Electron Fluence Daily Deep Dielectric Discharge Probability: 1% Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/12 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 12 APRIL AND FORECAST FOR 13 APRIL - 15 APRIL STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 12 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 12 Apr: 71/6 1B. SOLAR FORECAST 13 Apr 14 Apr 15 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 68/2 68/2 68/2 COMMENT: Solar activity was very low for UT day, 12 April. There are currently no sunspot regions on the visible disk. Very low levels of solar activity are expected for the next three UT days, 13-15 April. No Earth-directed CMEs were observed in the available coronagraph imagery. During the last 24 hours, the solar wind speed ranged between 390 km/s and 460 km/s, declining in general. The solar wind speed at the time of writing this report was 400 km/s. The total IMF (Bt) varied between 2 nT and 7 nT. The north-south component of the IMF (Bz) varied in the range -4 nT to +4 nT, and mostly remained southward (negative values) during the last 24 hours. Solar wind speed is expected to continue to decline towards its nominal levels today (13 April). Some mild enhancements in solar wind speed are possible on UT day 15 April due to small patchy recurrent coronal holes reaching geoeffective location on the solar disk. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 12 Apr: Quiet to Unsettled Estimated Indices 12 Apr : A K Australian Region 6 12113221 Darwin 5 12112222 Townsville 7 12213222 Learmonth 7 12113231 Alice Springs 6 12113221 Gingin 7 12113231 Canberra 2 01112110 Hobart 7 12223221 Estimated Antarctic Regional K Indices 12 Apr : Macquarie Island 8 01134310 Casey 10 23333221 Mawson 17 23323254 Observed Regional daily pc3 Indices 12 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 13 (Quiet) Canberra 22 (Quiet to unsettled) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 12 Apr : A Fredericksburg 6 Planetary 7 Observed AFr/Ap Indices 11 Apr : A K Fredericksburg 4 Planetary 7 1111 2322 2B. MAGNETIC FORECAST Date Ap Conditions 13 Apr 5 Quiet 14 Apr 5 Quiet 15 Apr 10 Quiet to Unsettled COMMENT: Geomagnetic activity in the Australian region was quiet to unsettled levels through UT day, 12 April. Geomagnetic activity in the Antarctic region was mostly at quiet to active levels with an isolated short minor storm periods. There mildly disturbed conditions were in response to slightly elevated solar wind speed and prolonged (though weak) IMF Bz southward conditions. Mostly quiet levels of global geomagnetic activity may be expected for UT days, 13 and 14 April. Conditions can reach unsettled to active levels on UT day 15 April due to recurrent patchy coronal holes. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 12 Apr Normal Normal Normal PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 13 Apr Normal Normal Normal 14 Apr Normal Normal Normal 15 Apr Normal Normal Normal-fair COMMENT: Mostly normal HF propagation conditions are expected for the next three UT days, 13-15 Apr. Mild degradation may happen in high-latitude regions on 15 Apr due to a possible increase in geomagnetic activity associated with patchy coronal hole effects. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 12 Apr -2 Observed Australian Regional MUFs Cocos Island Region: Enhanced by 15% during local day. Enhanced by 85% during local night. Niue Island Region: No data available. Northern Australian Region: Near predicted monthly values during local day. Enhanced by 20% during local night. Southern Australian Region: Depressed by 15% during local day. Enhanced by 40% during local night. Antarctic Region (Casey/Scott Base/Davis/Mawson): Enhanced by 15% over the UT day. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 13 Apr -2 Near predicted monthly values 14 Apr -2 Near predicted monthly values 15 Apr -10 Near predicted monthly values COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values with periods of minor to significant enhancements for the Australian region on UT day, 12 April. Some periods of minor MUF depressions were also recorded in the Southern Australian regions. MUFs in the Australian regions are expected to stay mostly near predicted monthly values for the next three UT days, 13 to 15 April. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 11 Apr Daily Proton Fluence >1 MeV: 1.2e+05 Daily Proton Fluence >10 MeV: 4.7e+04 Daily Electron Fluence >2 MeV: 2.20e+06 Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/13 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 13 APRIL AND FORECAST FOR 14 APRIL - 16 APRIL STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 13 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 13 Apr: 70/5 1B. SOLAR FORECAST 14 Apr 15 Apr 16 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 70/5 70/5 68/2 COMMENT: Solar activity was very low for UT day, 13 April. There are currently no sunspot regions on the visible disk. Very low levels of solar activity are expected for the next three UT days, 14-16 April. No Earth-directed CMEs were observed in the available coronagraph imagery. During the last 24 hours, the solar wind speed ranged between 370 km/s and 420 km/s. The solar wind speed at the time of writing this report was 390 km/s. The total IMF (Bt) was mostly steady near 4 nT. The north-south component of the IMF (Bz) varied in the range -4 nT to +2 nT, and mostly remained weakly southward (negative values) during the last 24 hours. The solar wind speed is expected to be mostly near its background levels for the next three days, 14-16 Apr, although some slight enhancements may be observed due to patchy coronal holes. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 13 Apr: Quiet Estimated Indices 13 Apr : A K Australian Region 4 12102211 Darwin 4 22102211 Townsville 5 22112211 Learmonth 4 12002222 Alice Springs 3 12002211 Gingin 4 11002222 Canberra 3 11201201 Hobart 5 12121221 Estimated Antarctic Regional K Indices 13 Apr : Macquarie Island 2 00021210 Casey 9 43211222 Mawson 24 33223265 Observed Regional daily pc3 Indices 13 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 6 (Quiet) Canberra 4 (Quiet) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 13 Apr : A Fredericksburg 5 Planetary 5 Observed AFr/Ap Indices 12 Apr : A K Fredericksburg 5 Planetary 6 1211 2222 2B. MAGNETIC FORECAST Date Ap Conditions 14 Apr 5 Quiet 15 Apr 7 Quiet 16 Apr 5 Quiet COMMENT: Geomagnetic activity in the Australian region was at quiet levels through UT day, 13 April. Geomagnetic activity in the Antarctic region was mostly at quiet to active levels with an isolated short minor storm periods. These mildly disturbed conditions were in response to slightly elevated solar wind speed and prolonged (though weak) IMF Bz southward conditions. Global geomagnetic activity is expected to be mostly at Quiet levels for the next three days, 14-16 April and a times may reach Unsettled levels due to weak coronal hole effects. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 13 Apr Normal Normal Normal PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 14 Apr Normal Normal Normal 15 Apr Normal Normal Normal 16 Apr Normal Normal Normal COMMENT: Mostly normal HF propagation conditions are expected for the next three UT days, 14-16 Apr. Mild degradation may happen in high-latitude regions due to a possible increase in geomagnetic activity associated with patchy coronal hole effects. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 13 Apr -1 Observed Australian Regional MUFs Cocos Island Region: Enhanced by 35% during local day. Enhanced by 145% during local night. Niue Island Region: Depressed by 20% during local day. Enhanced by 30% during local night. Northern Australian Region: Depressed by 15% during local day. Near predicted monthly values during local night. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 35% during local night. Antarctic Region (Casey/Scott Base/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 14 Apr -2 Near predicted monthly values 15 Apr -10 Near predicted monthly values 16 Apr -2 Near predicted monthly values COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values with periods of minor to significant enhancements for the Australian region on UT day, 13 April. Some periods of minor MUF depressions were also recorded in the Northern Australian and Niue Island during the local day. Sporadic-E occurrences were seen over some sites. MUFs in the Australian regions are expected to stay mostly near predicted monthly values for the next three UT days, 14 to 16 April. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 12 Apr Daily Proton Fluence >1 MeV: 6.6E+04 Daily Proton Fluence >10 MeV: 4.6E+04 Daily Electron Fluence >2 MeV: 1.10E+06 (normal fluence) Electron Fluence Daily Deep Dielectric Discharge Probability: 1% Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/14 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 14 APRIL AND FORECAST FOR 15 APRIL - 17 APRIL STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 14 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 14 Apr: 69/3 1B. SOLAR FORECAST 15 Apr 16 Apr 17 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 70/5 68/2 68/2 COMMENT: Solar activity was very low for UT day, 14 April. There are currently no sunspot regions on the visible disk. Very low levels of solar activity are expected for the next three UT days, 15-17 April. No Earth-directed CMEs were observed in the available coronagraph imagery. During the last 24 hours, the solar wind speed was mostly steady near 400 km/s. The total IMF (Bt) was in range 3 nT to 8 nT. The north-south component of the IMF (Bz) varied in the range -6 nT to +6 nT. There were few prolonged periods of southward (negative values) Bz during the last 24 hours. The solar wind speed is expected to be mostly near its background to mildly elevated levels for the next three days, 14-16 Apr, in response to small patchy coronal holes. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 14 Apr: Quiet Estimated Indices 14 Apr : A K Australian Region 3 22210002 Darwin 3 22210002 Townsville 3 22210002 Learmonth 4 22220002 Alice Springs 3 22210002 Gingin 2 11210002 Canberra 3 31200001 Hobart 3 12220001 Estimated Antarctic Regional K Indices 14 Apr : Macquarie Island 4 12320001 Casey 11 34431011 Mawson 14 44331123 Observed Regional daily pc3 Indices 14 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 0 (Quiet) Canberra 0 (Quiet) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 14 Apr : A Fredericksburg 8 Planetary 9 Observed AFr/Ap Indices 13 Apr : A K Fredericksburg 4 Planetary 5 1201 1211 2B. MAGNETIC FORECAST Date Ap Conditions 15 Apr 7 Quiet 16 Apr 5 Quiet 17 Apr 5 Quiet COMMENT: Geomagnetic activity in the Australian region was at quiet levels through UT day, 14 April. Geomagnetic activity in the Antarctic region was mostly at quiet to active levels. These mildly disturbed conditions in high latitude regions were in response to slightly elevated solar wind speed and prolonged IMF Bz southward conditions. Global geomagnetic activity is expected to be mostly at quiet levels for the next three days, 15-17 April and a times may reach unsettled levels particularly in the high latitude regions due to weak coronal hole effects. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 14 Apr Normal Normal Normal-fair PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 15 Apr Normal Normal Normal 16 Apr Normal Normal Normal 17 Apr Normal Normal Normal COMMENT: Mostly normal HF propagation conditions are expected for the next three UT days, 15-17 April. Mild degradation may happen in high-latitude regions due to a possible increase in geomagnetic activity associated with patchy coronal hole effects. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 14 Apr -2 Observed Australian Regional MUFs Cocos Island Region: Near predicted monthly values during local day. Enhanced by 75% during local night. Niue Island Region: Depressed by 15% during local day. Enhanced by 20% during local night. Northern Australian Region: Near predicted monthly values during local day. Enhanced by 15% during local night. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 30% during local night. Enhanced by 20% after local dawn. Antarctic Region (Casey/Scott Base/Davis/Mawson): Enhanced by 30% over the UT day. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 15 Apr 0 Near predicted monthly values 16 Apr 0 Near predicted monthly values 17 Apr 1 Near predicted monthly values COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values with periods of minor to significant enhancements for the Australian region on UT day, 14 April. Some periods of minor MUF depressions were also recorded over Niue Island during the local day. Sporadic-E occurrences were seen over some sites. MUFs in the Australian regions are expected to stay mostly near predicted monthly values for the next three UT days, 15 to 17 April. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 13 Apr Daily Proton Fluence >1 MeV: 5.6e+04 Daily Proton Fluence >10 MeV: 4.7e+04 Daily Electron Fluence >2 MeV: 1.70e+06 (normal fluence) Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/15 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 15 APRIL AND FORECAST FOR 16 APRIL - 18 APRIL STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 15 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 15 Apr: 68/2 1B. SOLAR FORECAST 16 Apr 17 Apr 18 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 68/2 68/2 68/2 COMMENT: Solar activity was very low for UT day, 15 April. There are currently no sunspot regions on the visible disk. Very low levels of solar activity are expected for the next three UT days, 16-18 April. No Earth-directed CMEs were observed in the available coronagraph imagery. During the last 24 hours, the solar wind speed was mostly steady near 410 km/s. The total IMF (Bt) was in range 1 nT to 5 nT. The north-south component of the IMF (Bz) varied in the range -3 nT to +3 nT. The solar wind speed is expected to be mostly near its background to mildly elevated levels for the next three days, 16-18 Apr, in response to small patchy coronal holes. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 15 Apr: Quiet Estimated Indices 15 Apr : A K Australian Region 4 22111112 Darwin 3 22111101 Townsville 4 22121111 Learmonth 5 22121112 Alice Springs 3 22111101 Gingin 5 22111122 Canberra 3 11100003 Hobart 4 22122101 Estimated Antarctic Regional K Indices 15 Apr : Macquarie Island 2 11121000 Casey 8 33221222 Mawson 25 54432154 Observed Regional daily pc3 Indices 15 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 0 (Quiet) Canberra 0 (Quiet) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 15 Apr : A Fredericksburg 7 Planetary 7 Observed AFr/Ap Indices 14 Apr : A K Fredericksburg 7 Planetary 8 2322 1113 2B. MAGNETIC FORECAST Date Ap Conditions 16 Apr 5 Quiet 17 Apr 5 Quiet 18 Apr 5 Quiet COMMENT: Geomagnetic activity in the Australian region was at quiet levels through UT day, 15 April. Geomagnetic activity in the Antarctic region was mostly at quiet to active levels with an isolated short minor storm periods. These disturbed conditions in high latitude regions were in response to slightly elevated solar wind speed and prolonged weak IMF Bz southward conditions. Global geomagnetic activity is expected to be mostly at quiet levels for the next three days, 16-18 April, and occasionally may reach unsettled levels due to weak coronal hole effects. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 15 Apr Normal Normal Normal PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 16 Apr Normal Normal Normal 17 Apr Normal Normal Normal 18 Apr Normal Normal Normal COMMENT: Mostly normal HF propagation conditions are expected for the next three UT days, 16-18 April. Mild degradation may happen in high-latitude regions due to a possible increase in geomagnetic activity associated with patchy coronal hole effects. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 15 Apr 0 Observed Australian Regional MUFs Cocos Island Region: Enhanced by 20% during local day. Enhanced by 105% during local night. Niue Island Region: Near predicted monthly values during local day. Enhanced by 25% during local night. Northern Australian Region: Near predicted monthly values during local day. Enhanced by 15% during local night. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 35% during local night. Enhanced by 25% after local dawn. Antarctic Region (Casey/Scott Base/Davis/Mawson): Enhanced by 25% over the UT day. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 16 Apr 0 Near predicted monthly values 17 Apr 0 Near predicted monthly values 18 Apr 0 Near predicted monthly values COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values with periods of minor to significant enhancements for the Australian region on UT day, 15 April. Sporadic-E occurrences were seen over some sites. MUFs in the Australian regions are expected to stay mostly near predicted monthly values for the next three UT days, 16 to 18 April. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 14 Apr Daily Proton Fluence >1 MeV: 6.3E+04 Daily Proton Fluence >10 MeV: 4.7E+04 Daily Electron Fluence >2 MeV: 1.70E+06 (normal fluence) Electron Fluence Daily Deep Dielectric Discharge Probability: 1% Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/16 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 16 APRIL AND FORECAST FOR 17 APRIL - 19 APRIL STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 16 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 16 Apr: 69/3 1B. SOLAR FORECAST 17 Apr 18 Apr 19 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 69/3 69/3 69/3 COMMENT: Solar activity was very low for UT day, 16 April. There are currently no sunspot regions on the visible disk. Very low levels of solar activity are expected for the next three UT days, 17-19 April. A CME first observed in the LASCO C2 imagery starting at 16/1424 UT is a far-side event or a east limb event. Based on the location of the CME on the Sun, it will not impact the Earth. During the last 24 hours, the solar wind speed gradually decreased from 450 km/s to 310 km/s, in response to the waning effect of the coronal holes. The total IMF (Bt) was in range 2 nT to 5 nT. The north-south component of the IMF (Bz) varied in the range -2 nT to +1 nT. The solar wind speed is expected to be mostly remain near its background levels for the next three days, 17-19 Apr. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 16 Apr: Quiet Estimated Indices 16 Apr : A K Australian Region 1 11100110 Darwin 2 21100001 Townsville 2 21101110 Learmonth 1 11100110 Alice Springs 1 11100110 Gingin 2 11101110 Canberra 0 10000000 Hobart 2 11111110 Estimated Antarctic Regional K Indices 16 Apr : Macquarie Island 0 01100000 Casey 7 33211221 Mawson 16 53321333 Observed Regional daily pc3 Indices 16 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 0 (Quiet) Canberra 0 (Quiet) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 16 Apr : A Fredericksburg 5 Planetary 5 Observed AFr/Ap Indices 15 Apr : A K Fredericksburg 6 Planetary 6 3221 2111 2B. MAGNETIC FORECAST Date Ap Conditions 17 Apr 5 Quiet 18 Apr 5 Quiet 19 Apr 5 Quiet COMMENT: Geomagnetic activity in the Australian region was at quiet levels through UT day, 16 April. Geomagnetic activity in the Antarctic region was mostly at quiet to active levels with an isolated short minor storm periods. Global geomagnetic activity is expected to be mostly at quiet levels for the next three days, 17-19 April, and occasionally may reach unsettled levels. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 16 Apr Normal Normal Normal PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 17 Apr Normal Normal Normal 18 Apr Normal Normal Normal 19 Apr Normal Normal Normal COMMENT: Mostly normal HF propagation conditions are expected for the next three UT days, 17-19 April. Mild degradation may happen in high-latitude regions. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 16 Apr -3 Observed Australian Regional MUFs Cocos Island Region: Near predicted monthly values during local day. Enhanced by 85% during local night. Niue Island Region: Near predicted monthly values. Northern Australian Region: Near predicted monthly values during local day. Enhanced by 20% during local night. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 15% during local night. Enhanced by 25% after local dawn. Antarctic Region (Casey/Scott Base/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 17 Apr 0 Near predicted monthly values 18 Apr 0 Near predicted monthly values 19 Apr 0 Near predicted monthly values COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values with periods of minor to significant enhancements for the Australian region on UT day, 16 April. Sporadic-E occurrences were seen over some sites. MUFs in the Australian regions are expected to stay mostly near predicted monthly values for the next three UT days, 17 to 19 April. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 15 Apr Daily Proton Fluence >1 MeV: 5.9e+04 Daily Proton Fluence >10 MeV: 4.7e+04 Daily Electron Fluence >2 MeV: 1.20e+06 Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/17 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 17 APRIL AND FORECAST FOR 18 APRIL - 20 APRIL STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 17 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 17 Apr: 68/2 1B. SOLAR FORECAST 18 Apr 19 Apr 20 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 69/3 69/3 69/3 COMMENT: Solar activity was very low on UT day, 17 April. The visible disc is spotless. Very low levels of solar activity are expected for the next three days, 18-20 April. During the last 24 hours, the solar wind was undisturbed with wind speed between 290 and 355 km/s, total IMF (Bt) 5 nT or less, and a north-south IMF component (Bz) range of -4 nT to +3 nT. Solar wind parameters are expected to be mostly near background levels for the next two days, 18-19 Apr with slightly elevated conditions on 20 Apr. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 17 Apr: Quiet Estimated Indices 17 Apr : A K Australian Region 1 11001001 Darwin 1 11101001 Townsville 2 11111001 Learmonth 1 11011001 Alice Springs 0 01000001 Gingin 1 11001001 Canberra 0 00000000 Hobart 2 11111001 Estimated Antarctic Regional K Indices 17 Apr : Macquarie Island 2 11021000 Casey 5 23211002 Mawson 14 42223115 Observed Regional daily pc3 Indices 17 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 0 (Quiet) Canberra 0 (Quiet) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 17 Apr : A Fredericksburg 5 Planetary 5 Observed AFr/Ap Indices 16 Apr : A K Fredericksburg 5 Planetary 5 2 2B. MAGNETIC FORECAST Date Ap Conditions 18 Apr 5 Quiet 19 Apr 5 Quiet 20 Apr 9 Quiet to Unsettled COMMENT: The geomagnetic field in the Australian region was at quiet levels on UT day, 17 April. Geomagnetic activity in the Antarctic region was mostly quiet to unsettled. Global geomagnetic activity is expected to be mostly at quiet levels for the next two days, 18-19 April. Quiet to unsettled levels with an isolated active period possible on 20 Apr. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 17 Apr Normal Normal-fair Normal-fair PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 18 Apr Normal Normal Normal 19 Apr Normal Normal Normal 20 Apr Normal Normal Normal-fair COMMENT: Some degradations in MUFs in mid to high southern hemisphere. Mostly normal HF propagation conditions are expected for the next three UT days, 18-20 Apr. Mild degradations at high-latitudes possible over the forecast period. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 17 Apr -2 Observed Australian Regional MUFs Cocos Island Region: Near predicted monthly values during local day. Enhanced by 95% aat times during local night. Niue Island Region: Near predicted monthly values. Northern Australian Region: Near predicted monthly values. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 25% during local night. Enhanced by 30% after local dawn. Antarctic Region (Casey/Scott Base/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 18 Apr 0 Near predicted monthly values 19 Apr 0 Near predicted monthly values 20 Apr 0 Near predicted monthly values COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values with periods of minor to significant enhancements for the Australian region on UT day, 17 Apr. Sporadic-E occurrences were observed at Darwin 06-14 UT. MUFs in the Australian regions are expected to stay mostly near predicted monthly values for the next three UT days, 18 to 20 Apr. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 16 Apr Daily Proton Fluence >1 MeV: 5.5e+04 Daily Proton Fluence >10 MeV: 4.7e+04 Daily Electron Fluence >2 MeV: 1.4E+06 Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/18 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 18 APRIL AND FORECAST FOR 19 APRIL - 21 APRIL STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 18 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 18 Apr: 70/5 1B. SOLAR FORECAST 19 Apr 20 Apr 21 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 69/3 69/3 69/3 COMMENT: Solar activity was very low on UT day, 18 April. Very low levels of solar activity are expected for the next three days, 19-21 April. The visible disc has been spotless and there are no returning regions expected. A small, disappearing filament at S26W09 was observed at 1858 UT in SDO AIA 304 images; the event was less evident in H-alpha. No Earth-directed CMEs were observed in the available images. During the last 24 hours, the solar wind was undisturbed with wind speed between 309 and 354 km/s, total IMF (Bt) range 1 to 6 nT, and a north-south IMF component (Bz) range of -6 nT to +3 nT. Solar wind parameters are expected to be mostly near background levels on 19 Apr with somewhat elevated conditions in the latter half of 20 Apr due to a lower latitude coronal hole high speed stream. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 18 Apr: Quiet Estimated Indices 18 Apr : A K Australian Region 2 12210000 Darwin 3 22210001 Townsville 3 12211001 Learmonth 3 22210000 Alice Springs 2 12210001 Gingin 1 11101000 Canberra 1 11100000 Hobart 3 11221100 Estimated Antarctic Regional K Indices 18 Apr : Macquarie Island 2 00221000 Casey 5 22321100 Mawson 9 34321210 Observed Regional daily pc3 Indices 18 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 0 (Quiet) Canberra 0 (Quiet) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 18 Apr : A Fredericksburg 5 Planetary 5 Observed AFr/Ap Indices 17 Apr : A K Fredericksburg 4 Planetary 4 2012 1011 2B. MAGNETIC FORECAST Date Ap Conditions 19 Apr 5 Quiet 20 Apr 11 Unsettled 21 Apr 12 Unsettled COMMENT: Unsettled to isolated active periods expected in latter part of 20 and 21 Apr due to coronal hole high speed stream. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 18 Apr Normal Normal Normal PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 19 Apr Normal Normal Normal 20 Apr Normal Normal Normal-fair 21 Apr Normal Normal Normal-fair COMMENT: Mostly normal HF propagation conditions are expected for the next three UT days, 19-21 Apr. Mild degradations possible on 21 Apr. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 18 Apr 3 Observed Australian Regional MUFs Cocos Island Region: Near predicted monthly values during local day. Enhanced by 80% during local night. Niue Island Region: Near predicted monthly values during local day. Enhanced by 35% during local night. Northern Australian Region: Near predicted monthly values during local day. Enhanced by 30% during local night. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 30% during local night. Enhanced by 20% after local dawn. Antarctic Region (Casey/Scott Base/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 19 Apr 0 Near predicted monthly values 20 Apr 0 Near predicted monthly values 21 Apr 0 Near predicted monthly values COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values with periods of minor to significant enhancements for the Australian region on UT day, 18 Apr. Sporadic-E was observed at Niue 03-17 UT, Darwin and Townsville 07-10 UT, Sydney 01-05 UT and 14-16 UT, Canberra 12-18 UT. Spread F observed at Cocos 16-20 UT, Norfolk 12-18 UT. MUFs in the Australian regions are expected to be mostly near predicted monthly values for the next three days, 19 to 21 Apr with possible mild depressions in MUFs on 21 Apr. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 17 Apr Daily Proton Fluence >1 MeV: 6.0E+04 Daily Proton Fluence >10 MeV: 4.7E+04 Daily Electron Fluence >2 MeV: 1.60E+06 (normal fluence) Electron Fluence Daily Deep Dielectric Discharge Probability: 1% Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/19 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 19 APRIL AND FORECAST FOR 20 APRIL - 22 APRIL STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 19 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 19 Apr: 69/3 1B. SOLAR FORECAST 20 Apr 21 Apr 22 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 69/3 69/3 69/3 COMMENT: Solar activity was very low on UT day, 19 April. Very low levels of solar activity are expected for the next three days, 20-22 April. The visible disc has been spotless and there are no returning regions expected. No CME was associated with the filament event reported yesterday and no Earth bound CMEs observed in available LASCO and STEREO images. The solar wind has been undisturbed with wind speed below 335 km/s, total IMF (Bt) range 1 nT to 4 nT, and a north-south IMF component (Bz) range of -3 nT to +2 nT. Solar wind parameters are expected to be mostly near background levels at first with a modest increase in activity in the latter part of 20 April due to a lower latitude coronal hole high speed stream. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 19 Apr: Quiet Estimated Indices 19 Apr : A K Australian Region 1 11000001 Darwin 1 11100001 Townsville 1 11001001 Learmonth 1 11100100 Alice Springs 0 10000001 Gingin 1 01000110 Canberra 0 00000000 Hobart 1 10001101 Estimated Antarctic Regional K Indices 19 Apr : Macquarie Island 0 00001000 Casey 2 12201100 Mawson 4 11101132 Observed Regional daily pc3 Indices 19 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 0 (Quiet) Canberra 0 (Quiet) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 19 Apr : A Fredericksburg 3 Planetary 4 Observed AFr/Ap Indices 18 Apr : A K Fredericksburg 4 Planetary 6 2211 2211 2B. MAGNETIC FORECAST Date Ap Conditions 20 Apr 11 Unsettled 21 Apr 12 Unsettled 22 Apr 8 Quiet to Unsettled COMMENT: Unsettled to isolated active periods expected in latter part of 20 and 21 April due to coronal hole high speed stream. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 19 Apr Normal Normal Normal-fair PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 20 Apr Normal Normal Normal-fair 21 Apr Normal Normal Normal-fair 22 Apr Normal Normal Normal-fair COMMENT: Some degradations in conditions on 19 April. Mostly normal HF propagation conditions are expected for the next three UT days, 20-22 Apr. Mild degradations possible on 21 Apr. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 19 Apr 1 Observed Australian Regional MUFs Cocos Island Region: Enhanced by 35% during local day. Enhanced by 135% during local night. Niue Island Region: No data available. Northern Australian Region: Depressed by 20% during local day. Enhanced by 30% during local night. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 20% during local night. Antarctic Region (Casey/Scott Base/Davis/Mawson): Near predicted monthly values during daytime. Very weak F region at night. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 20 Apr 0 Near predicted monthly values 21 Apr -5 Near predicted monthly values 22 Apr 0 Near predicted monthly values COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values with periods of minor to significant enhancements for the Australian region on UT day, 19 Apr. Hobart ionosphere very weak 16-20 UT. Sporadic-E was observed at Cocos 13-23 UT, Brisbane and Norfolk 00-03, 19-23 UT, Learmonth 10-18 UT, Sydney 12-17, 20-23 UT. Spread F observed at Townsville and Brisbane 13-18 UT, Learmonth 19-22 UT. MUFs in the Australian regions are expected to be mostly near predicted monthly values for the next three days, 20 to 22 Apr with possible mild depressions in MUFs on 21 Apr. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 18 Apr Daily Proton Fluence >1 MeV: 5.7E+04 Daily Proton Fluence >10 MeV: 4.6E+04 Daily Electron Fluence >2 MeV: 1.40E+06 (normal fluence) Electron Fluence Daily Deep Dielectric Discharge Probability: 1% Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/20 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 20 APRIL AND FORECAST FOR 21 APRIL - 23 APRIL STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 20 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 20 Apr: 68/2 1B. SOLAR FORECAST 21 Apr 22 Apr 23 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 69/3 69/3 69/3 COMMENT: Solar activity was very low on UT day, 20 April. Very low levels of solar activity are expected for the next three UT days, 21-23 April. The visible disc has been spotless and there are no returning regions expected. No Earth bound CMEs observed in available LASCO and STEREO images. The day started with the solar wind parameters at nominal levels, but a weak shock was observed in the solar wind at 0130UT. Post shock, the solar wind suddenly increased from 295 km/s to 330 km/s and reached a peak of 388 km/s at 0826 UT. During the later hours of the day the solar wind speed gradually decreased to around 330 km/s by 2300 UT. The total IMF (Bt) was initially between 3 nT and 6 nT. Post shock, Bt increased up to around 16 nT. The north-south IMF component (Bz) ranged from -5 nT to +7 nT until around 0630 UT, then went negative up to -15 nT and stayed negative until 1330 UT. Bz then turned positive and rose up to +13 nT. The solar wind particle density was around 3 ppcc before the shock and postshock it increased to 10 ppcc and rose up to around 35 ppcc. After 0730 UT, the particle density varied between 6 and 14 ppcc. The shock may have arrived because of the unexpected glancing blow of a slow CME that was observed on UT day 15 April. Solar wind parameters may show minor to moderate strengthening on UT day 21 April and minor strengthening on 22 and 23 April. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 20 Apr: Quiet to Minor Storm Estimated Indices 20 Apr : A K Australian Region 13 22335300 Darwin 13 33334301 Townsville 15 33335301 Learmonth 14 32335300 Alice Springs 13 22335301 Gingin 13 22335300 Canberra 9 22334200 Hobart 14 22345300 Estimated Antarctic Regional K Indices 20 Apr : Macquarie Island 36 21567300 Casey 14 34333312 Mawson 16 24433323 Observed Regional daily pc3 Indices 20 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 2 (Quiet) Alice Springs 0 (Quiet) Gingin 2 (Quiet) Canberra 4 (Quiet) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 20 Apr : A Fredericksburg 15 Planetary 20 Observed AFr/Ap Indices 19 Apr : A K Fredericksburg 2 Planetary 5 1001 2322 2B. MAGNETIC FORECAST Date Ap Conditions 21 Apr 12 Mostly unsettled, isolated active periods possible 22 Apr 10 Quiet to Unsettled 23 Apr 10 Quiet to Unsettled COMMENT: SWS Geomagnetic Warning 2 was issued on 20 April and is current for 20-21 Apr. In the SWS magnetometer data for 20 Apr, a weak (10nT) impulse was observed at 0232UT. On UT day 20 April, the geomagnetic conditions in the Australian and Antarctic regions varied from quiet to minor storm levels. Short periods of isolated major storm were also recorded in the Antarctic region. Global geomagnetic conditions may vary from unsettled to active levels on UT day 21 April and quiet to unsettled levels on 22 and 23 April. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 20 Apr Normal Normal Normal PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 21 Apr Normal Normal Normal-fair 22 Apr Normal Normal Normal 23 Apr Normal Normal Normal COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values with periods of minor to significant enhancements on UT day, 20 Apr. Nearly similar HF conditions may be expected on UT days 22 and 23 April. However, minor MUF depressions may be observed on UT day 21 April. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 20 Apr 1 Observed Australian Regional MUFs Cocos Island Region: Enhanced by 25% during local day. Enhanced by 105% during local night. Niue Island Region: No data available during local day. No data available during local night. Enhanced by 45% after local dawn. Northern Australian Region: Near predicted monthly values during local day. Enhanced by 45% during local night. Enhanced by 35% after local dawn. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 25% during local night. Enhanced by 20% after local dawn. Antarctic Region (Casey/Scott Base/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 21 Apr -5 Near predicted monthly values/depressed 10 to 20% 22 Apr 0 Near predicted monthly values 23 Apr 0 Near predicted monthly values COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values with periods of minor to significant enhancements for the Australian region on UT day, 20 Apr. Nearly similar HF conditions may be expected on UT days 22 and 23 April. However, minor MUF depressions may be observed on UT day 21 April. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 19 Apr Daily Proton Fluence >1 MeV: 6.2E+04 Daily Proton Fluence >10 MeV: 4.7E+04 Daily Electron Fluence >2 MeV: 1.70E+06 (normal fluence) Electron Fluence Daily Deep Dielectric Discharge Probability: 1% Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/21 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 21 APRIL AND FORECAST FOR 22 APRIL - 24 APRIL STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 21 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 21 Apr: 69/3 1B. SOLAR FORECAST 22 Apr 23 Apr 24 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 69/3 69/3 69/3 COMMENT: Solar activity was very low on UT day, 21 April. Very low levels of solar activity are expected for the next three UT days, 22-24 April. The visible disc has been spotless and there are no returning regions expected. No Earth bound CMEs observed in available LASCO and STEREO images. Through UT day 21 April, the solar wind speed stayed mostly between 330 km/s and 350 km/s during the first half of the day and then showed a gradual rise to 450 km/s by 2100 UT and then stayed around 450 km/s. The total IMF (Bt) gradually decreased from 15 nT to 3 nT. The north-south IMF component (Bz) stayed mostly positive by 0900 UT, then varied in the range +8/-9 nT by 1600 UT and in the range +3/-5 nT thereafter. The solar wind particle density varied between 3 ppcc and 33 ppcc, showing a gradually decreasing trend through the day. These observations seem consistent with the the previously anticipated coronal hole effects. Solar wind parameters may show minor to moderate strengthening on UT day 22 and 23 April due to coronal hole effects and then decline to more nominal values on 24 April. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 21 Apr: Quiet to Unsettled Estimated Indices 21 Apr : A K Australian Region 8 22223321 Darwin 9 32223311 Townsville 8 32222321 Learmonth 11 32223421 Alice Springs 8 22223321 Gingin 6 11112420 Canberra 5 21212310 Hobart 9 21223421 Estimated Antarctic Regional K Indices 21 Apr : Macquarie Island 12 11033531 Casey 10 23322322 Mawson 22 21212654 Observed Regional daily pc3 Indices 21 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 0 (Quiet) Canberra 0 (Quiet) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 21 Apr : A Fredericksburg 9 Planetary 10 Observed AFr/Ap Indices 20 Apr : A K Fredericksburg 16 Planetary 23 2335 6222 2B. MAGNETIC FORECAST Date Ap Conditions 22 Apr 10 Quiet to Unsettled 23 Apr 10 Quiet to Unsettled 24 Apr 6 Mostly quiet COMMENT: On UT day 21 April, the geomagnetic conditions in the Australian and Antarctic regions varied mostly from quiet to unsettled levels. Short periods of isolated minor storm were also recorded in the Antarctic region. Global geomagnetic conditions may vary from quiet to unsettled levels on UT day 22 and 23 April and stay mostly quiet on 24 April. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 21 Apr Normal Normal Normal PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 22 Apr Normal Normal Normal 23 Apr Normal Normal Normal 24 Apr Normal Normal Normal COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values with periods of minor to significant enhancements on UT day, 21 April. Some periods of minor MUF depressions were also observed in some low-latitude regions. Mostly normal HF conditions may be expected for the next three UT days, 22 to 24 April. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 21 Apr 1 Observed Australian Regional MUFs Cocos Island Region: Near predicted monthly values during local day. Enhanced by 55% during local night. Enhanced by 25% after local dawn. Niue Island Region: Enhanced by 15% during local day. Enhanced by 40% during local night. Northern Australian Region: Depressed by 15% during local day. Enhanced by 40% during local night. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 25% during local night. Antarctic Region (Casey/Scott Base/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 22 Apr 0 Near predicted monthly values 23 Apr 0 Near predicted monthly values 24 Apr 5 Near predicted monthly values COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values with periods of minor to significant enhancements for the Australian region on UT day, 21 April. Some periods of minor MUF depressions were also observed in the Northern Australian regions. Mostly normal HF conditions may be expected in the Australian regions for the next three UT days, 22 to 24 April. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 20 Apr Daily Proton Fluence >1 MeV: 1.4E+05 Daily Proton Fluence >10 MeV: 4.6E+04 Daily Electron Fluence >2 MeV: 1.50E+06 (normal fluence) Electron Fluence Daily Deep Dielectric Discharge Probability: 1% Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/22 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 22 APRIL AND FORECAST FOR 23 APRIL - 25 APRIL STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 22 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 22 Apr: 71/6 1B. SOLAR FORECAST 23 Apr 24 Apr 25 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 71/6 71/6 71/6 COMMENT: Solar activity was very low on UT day, 22 April. Very low levels of solar activity are expected for the next three UT days, 23-25 April. The visible disc has been spotless and there are no returning regions expected. No Earth bound CMEs observed in available LASCO and STEREO images. During UT day 22 April, the solar wind speed was above 500 km/s for some time in the early hours, then stayed relatively steady above 450 km/s from around 0500 UT to 1700 UT, and then gradually decreased to nearly 430 km/s. The total IMF (Bt) gradually decreased from 5 nT to 3 nT. The north-south IMF component (Bz) stayed mostly in the range +3/-5 nT. The solar wind particle density varied between 3 ppcc and 7 ppcc. These observations seem consistent with the previously anticipated coronal hole effects. Solar wind parameters may show minor to moderate strengthening on UT day 23 April due to coronal hole effects and then decline to more nominal values on 24 and 25 April. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 22 Apr: Quiet to Unsettled Estimated Indices 22 Apr : A K Australian Region 4 11113101 Darwin 3 11112101 Townsville 4 21113101 Learmonth 5 21113111 Alice Springs 3 11103101 Gingin 4 21013111 Canberra 1 11001000 Hobart 4 11103111 Estimated Antarctic Regional K Indices 22 Apr : Macquarie Island 3 21013000 Casey 6 32212111 Mawson 20 54222235 Observed Regional daily pc3 Indices 22 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 2 (Quiet) Canberra 0 (Quiet) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 22 Apr : A Fredericksburg 7 Planetary 8 Observed AFr/Ap Indices 21 Apr : A K Fredericksburg 8 Planetary 9 1202 332NA 2B. MAGNETIC FORECAST Date Ap Conditions 23 Apr 10 Quiet to Unsettled 24 Apr 6 Quiet 25 Apr 6 Quiet COMMENT: On UT day 22 April, the geomagnetic conditions in the Australian and Antarctic regions varied mostly from quiet to unsettled levels. Short periods of isolated minor storm were also recorded in the Antarctic region. Global geomagnetic conditions may vary from quiet to unsettled levels on UT day 23 April and stay mostly quiet on 24 and 25 April. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 22 Apr Normal Normal Normal PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 23 Apr Normal Normal Normal 24 Apr Normal Normal Normal 25 Apr Normal Normal Normal COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values with periods of minor to significant enhancements on UT day, 22 April. Mostly normal HF conditions may be expected for the next three UT days, 23 to 25 April. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 22 Apr -1 Observed Australian Regional MUFs Cocos Island Region: Enhanced by 15% during local day. Enhanced by 50% during local night. Niue Island Region: Near predicted monthly values during local day. Enhanced by 25% during local night. Northern Australian Region: Near predicted monthly values during local day. Enhanced by 20% during local night. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 15% during local night. Antarctic Region (Casey/Scott Base/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 23 Apr 0 Near predicted monthly values 24 Apr 4 Near predicted monthly values 25 Apr 4 Near predicted monthly values COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values with periods of minor to significant enhancements for the Australian region on UT day, 22 April. Mostly normal HF conditions may be expected in the Australian regions for the next three UT days, 23 to 25 April. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 21 Apr Daily Proton Fluence >1 MeV: 9.2E+04 Daily Proton Fluence >10 MeV: 4.6E+04 Daily Electron Fluence >2 MeV: 1.20E+06 (normal fluence) Electron Fluence Daily Deep Dielectric Discharge Probability: 1% Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/23 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 23 APRIL AND FORECAST FOR 24 APRIL - 26 APRIL STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 23 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 23 Apr: 69/3 1B. SOLAR FORECAST 24 Apr 25 Apr 26 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 71/6 71/6 71/6 COMMENT: Solar activity was very low on UT day, 23 April. Very low levels of solar activity are expected for the next three UT days, 24-26 April. The visible disc has been spotless and there are no returning regions expected. No Earth bound CMEs observed in available LASCO and STEREO images. During UT day 23 April, the solar wind speed gradually decreased from 430 to nearly 365 km/s by 2300 UT. The total IMF (Bt) gradually increased from 3 nT to 6 nT by 2200 UT and then decreased to 4 nT by 2300 UT. The north-south IMF component (Bz) stayed mostly in the range +3/-3 nT, but went south up to -5 nT at 2213 UT. The solar wind particle density varied between 2 ppcc and 13 ppcc. These observations seem consistent with the previously anticipated weakening coronal hole effects. Solar wind parameters are expected to stay mostly at nominal values for the next three UT days, 24-26 April with the possibility of occasional slight strengthenings on 24 April. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 23 Apr: Quiet Estimated Indices 23 Apr : A K Australian Region 1 01010001 Darwin 2 11010002 Townsville 1 11110001 Learmonth 1 01110001 Alice Springs 1 01010001 Gingin 0 01000000 Canberra 0 01000000 Hobart 1 11110001 Estimated Antarctic Regional K Indices 23 Apr : Macquarie Island 0 11000000 Casey 4 13210002 Mawson 12 33221105 Observed Regional daily pc3 Indices 23 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 0 (Quiet) Canberra 0 (Quiet) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 23 Apr : A Fredericksburg 4 Planetary 4 Observed AFr/Ap Indices 22 Apr : A K Fredericksburg 10 Planetary 7 3311 2322 2B. MAGNETIC FORECAST Date Ap Conditions 24 Apr 6 Mostly quiet, isolated unsettled periods possible 25 Apr 5 Quiet 26 Apr 5 Quiet COMMENT: On UT day 23 April, the geomagnetic conditions in the Australian and Antarctic regions stayed at quiet levels. Short periods of isolated unsettled conditions were also recorded in the Antarctic region. Global geomagnetic conditions are expected to stay at quiet levels for the next three UT days, 24-26 April. Isolated unsettled periods may also be observed on 24 April. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 23 Apr Normal Normal Normal PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 24 Apr Normal Normal Normal 25 Apr Normal Normal Normal 26 Apr Normal Normal Normal COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values with periods of minor to moderate enhancements on UT day, 23 April. Some periods of minor MUF depressions were also observed in low-latitude regions. Mostly normal HF conditions may be expected for the next three UT days, 24 to 26 April. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 23 Apr -3 Observed Australian Regional MUFs Cocos Island Region: Near predicted monthly values during local day. Enhanced by 30% during local night. Niue Island Region: Depressed by 15% during local day. Near predicted monthly values during local night. Northern Australian Region: Near predicted monthly values. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 20% during local night. Enhanced by 20% after local dawn. Antarctic Region (Casey/Scott Base/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 24 Apr 0 Near predicted monthly values 25 Apr 2 Near predicted monthly values 26 Apr 2 Near predicted monthly values COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values with periods of minor to moderate enhancements for the Australian region on UT day, 23 April. Some periods of minor MUF depressions were also observed in the Northern Australian regions. Mostly normal HF conditions may be expected in the Australian regions for the next three UT days, 24 to 26 April. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 22 Apr Daily Proton Fluence >1 MeV: 6.0E+04 Daily Proton Fluence >10 MeV: 4.6E+04 Daily Electron Fluence >2 MeV: 2.90E+06 (normal fluence) Electron Fluence Daily Deep Dielectric Discharge Probability: 1% Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/24 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 24 APRIL AND FORECAST FOR 25 APRIL - 27 APRIL STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 24 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 24 Apr: 71/6 1B. SOLAR FORECAST 25 Apr 26 Apr 27 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 71/6 71/6 71/6 COMMENT: Solar activity was very low on UT day, 24 April. Very low levels of solar activity are expected for the next three UT days, 25-27 April. The visible disc has been spotless and there are no returning regions expected. No Earth bound CMEs observed in available LASCO and STEREO images. During UT day 24 April, the solar wind speed varied between 350 to 400 km/s. The total IMF (Bt) varied between 2 to 8 nT and the north-south IMF component (Bz) varied between -7 to 5 nT. Solar wind parameters are expected to stay mostly at nominal values for the next three UT days, 25-27 April, with the possibility of occasional slight strengthenings due to weak coronal hole influences. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 24 Apr: Quiet Estimated Indices 24 Apr : A K Australian Region 5 21111222 Cocos Island 3 21110211 Darwin 3 21100221 Townsville 5 21111222 Learmonth 5 21211222 Alice Springs 3 11100222 Gingin 4 20201222 Canberra 3 11101121 Hobart 4 11211122 Estimated Antarctic Regional K Indices 24 Apr : Macquarie Island 1 10010011 Casey 7 32301222 Mawson 19 52212245 Observed Regional daily pc3 Indices 24 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 15 (Quiet) Canberra 31 (Quiet to unsettled) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 24 Apr : A Fredericksburg 6 Planetary 6 Observed AFr/Ap Indices 23 Apr : A K Fredericksburg 4 Planetary 5 1111 1212 2B. MAGNETIC FORECAST Date Ap Conditions 25 Apr 5 Quiet, with chance of isolated Unsettled periods 26 Apr 5 Quiet, with chance of isolated Unsettled periods 27 Apr 5 Quiet, with chance of isolated Unsettled periods COMMENT: On UT day 24 April, the geomagnetic conditions in the Australian and Antarctic regions stayed at Quiet levels. Some isolated Unsettled conditions were also recorded in the Antarctic region, with Mawson stations experience some periods of Active to Minor Storm levels. Global geomagnetic conditions are expected to stay at Quiet levels for the next three UT days, 25-27 April, with a chance of isolated Unsettled periods due weak coronal hole influences. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 24 Apr Normal Normal Normal PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 25 Apr Normal Normal Normal 26 Apr Normal Normal Normal 27 Apr Normal Normal Normal COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values with periods of minor to moderate enhancements on UT day, 24 April. Mostly normal HF conditions may be expected for the next three UT days, 25-27 April. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 24 Apr -2 Observed Australian Regional MUFs Cocos Island Region: Near predicted monthly values during local day. Enhanced by 60% during local night. Niue Island Region: Mostly near predicted monthly values. Northern Australian Region: Near predicted monthly values during local day. Enhanced by 30% during local night. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 35% during local night. Enhanced by 20% after local dawn. Antarctic Region (Casey/Scott Base/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 25 Apr 2 Near predicted monthly values 26 Apr 2 Near predicted monthly values 27 Apr 2 Near predicted monthly values COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values with periods of minor to moderate enhancements for the Australian region on UT day, 24 April. Mostly normal HF conditions may be expected in the Australian regions for the next three UT days, 25-27 April. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 23 Apr Daily Proton Fluence >1 MeV: 7.2E+04 Daily Proton Fluence >10 MeV: 4.7E+04 Daily Electron Fluence >2 MeV: 9.10E+06 Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/25 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 25 APRIL AND FORECAST FOR 26 APRIL - 28 APRIL STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 25 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 25 Apr: 69/3 1B. SOLAR FORECAST 26 Apr 27 Apr 28 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 70/5 70/5 70/5 COMMENT: Solar activity was very low on UT day, 25 April. Very low levels of solar activity are expected for the next three UT days, 26-28 April. The visible disc has one numbered sunspot region, AR 2760, and there are no returning regions expected. No Earth bound CMEs were observed in available LASCO and STEREO images. During UT day 25 April, the solar wind speed varied between 370 to 450 km/s, and is currently around 380 km/s The total IMF (Bt) varied between 1-7 nT early in the UT day, then steadied and is currently varying between 3-4 nT. The north-south IMF component (Bz) varied between -5 to 4 nT at the start of the UT day, then became mainly northward between -1 to 3 nT. Solar wind parameters are expected to stay mostly at nominal values for the next three UT days, 26-28 April, with the possibility of occasional slight strengthenings due to weak coronal hole influences. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 25 Apr: Quiet Estimated Indices 25 Apr : A K Australian Region 2 22200000 Cocos Island 2 12200000 Darwin 2 22100001 Townsville 2 21200101 Learmonth 2 22200000 Alice Springs 2 21200001 Gingin 2 22200000 Canberra 1 21100000 Hobart 2 21211000 Estimated Antarctic Regional K Indices 25 Apr : Macquarie Island 2 11210000 Casey 4 33200000 Mawson 11 34314200 Observed Regional daily pc3 Indices 25 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 21 (Quiet to unsettled) Canberra 28 (Quiet to unsettled) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 25 Apr : A Fredericksburg 5 Planetary 6 Observed AFr/Ap Indices 24 Apr : A K Fredericksburg 6 Planetary 6 2010 1223 2B. MAGNETIC FORECAST Date Ap Conditions 26 Apr 6 Quiet, with a chance of isolated Unsettled periods 27 Apr 6 Quiet, with a chance of isolated Unsettled periods 28 Apr 6 Quiet, with a chance of isolated Unsettled periods COMMENT: On UT day 25 April, the geomagnetic conditions in the Australian region stayed at Quiet levels. The Antarctic region observed mainly Quiet levels, with some Unsettled to Active periods. Global geomagnetic conditions are expected to stay at mainly Quiet levels for the next three UT days, 26-28 April, with a chance of isolated Unsettled periods due to weak coronal hole influences. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 25 Apr Normal Normal Normal PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 26 Apr Normal Normal Normal 27 Apr Normal Normal Normal 28 Apr Normal Normal Normal COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values with periods of minor to moderate enhancements on UT day, 25 April. Mostly normal HF conditions may be expected for the next three UT days, 26-28 April. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 25 Apr 4 Observed Australian Regional MUFs Cocos Island Region: Enhanced by 15% during local day. Enhanced by 70% during local night. Niue Island Region: Near predicted monthly values during local day. Enhanced by 25% during local night. Northern Australian Region: Near predicted monthly values during local day. Enhanced by 35% during local night. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 65% during local night. Enhanced by 20% after local dawn. Antarctic Region (Casey/Scott Base/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 26 Apr 2 Near predicted monthly values 27 Apr 2 Near predicted monthly values 28 Apr 2 Near predicted monthly values COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values with periods of minor to moderate enhancements for the Australian region on UT day, 25 April. Sporadic E was observed over some sites. Mostly normal HF conditions may be expected in the Australian regions for the next three UT days, 26-28 April. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 24 Apr Daily Proton Fluence >1 MeV: 1.4E+05 Daily Proton Fluence >10 MeV: 4.7E+04 Daily Electron Fluence >2 MeV: 5.40E+06 (normal fluence) Electron Fluence Daily Deep Dielectric Discharge Probability: 1% Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/26 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 26 APRIL AND FORECAST FOR 27 APRIL - 29 APRIL STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 26 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 26 Apr: 69/3 1B. SOLAR FORECAST 27 Apr 28 Apr 29 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 70/5 70/5 70/5 COMMENT: Solar activity was Very Low on UT day, 26 April. Very Low levels of solar activity are expected for the next three UT days, 27-29 April. The visible disc has one numbered sunspot region, AR 2760, and there are no returning regions expected. No Earth bound CMEs were observed in available LASCO and STEREO images. During UT day 26 April, the solar wind speed varied between 360 to 430 km/s. The total IMF (Bt) varied between 1-6 nT, and the north-south IMF component (Bz) varied between -6 to 3 nT. Solar wind parameters are expected to stay mostly at nominal values for the next three UT days, 27-29 April, with the possibility of occasional slight strengthenings due to weak coronal hole influences. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 26 Apr: Quiet Estimated Indices 26 Apr : A K Australian Region 4 11012222 Cocos Island 4 11011222 Darwin 5 22012212 Townsville 6 22122212 Learmonth 4 11012222 Alice Springs 4 11112212 Gingin 7 12012332 Canberra 4 11012222 Hobart 5 11022222 Estimated Antarctic Regional K Indices 26 Apr : Macquarie Island 3 01022211 Casey 10 33313222 Mawson 24 24222356 Observed Regional daily pc3 Indices 26 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 2 (Quiet) Canberra 9 (Quiet) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 26 Apr : A Fredericksburg 6 Planetary 7 Observed AFr/Ap Indices 25 Apr : A K Fredericksburg 5 Planetary 6 3320 1212 2B. MAGNETIC FORECAST Date Ap Conditions 27 Apr 7 Quiet, with chance of isolated Unsettled periods 28 Apr 7 Quiet, with chance of isolated Unsettled periods 29 Apr 7 Quiet, with chance of isolated Unsettled periods COMMENT: On UT day 26 April, the geomagnetic conditions in the Australian region were mainly at Quiet levels, with Gingin station observing an isolated Unsettled period. The Antarctic region observed mainly Quiet to Unsettled levels, with Mawson station observing periods of Active and Minor to Moderate Storm levels. Global geomagnetic conditions are expected to stay at mainly Quiet levels for the next three UT days, 27-29 April, with a chance of isolated Unsettled periods due to weak coronal hole influences. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 26 Apr Normal Normal Normal PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 27 Apr Normal Normal Normal 28 Apr Normal Normal Normal 29 Apr Normal Normal Normal COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values with periods of minor to moderate enhancements on UT day 26 April. Mostly normal HF conditions are expected for the next three UT days, 27-29 April. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 26 Apr 5 Observed Australian Regional MUFs Cocos Island Region: Enhanced by 30% during local day. Enhanced by 75% during local night. Niue Island Region: Depressed by 15% during local day. Enhanced by 15% during local night. Northern Australian Region: Near predicted monthly values. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 40% during local night. Antarctic Region (Casey/Scott Base/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 27 Apr 2 Near predicted monthly values 28 Apr 2 Near predicted monthly values 29 Apr 2 Near predicted monthly values COMMENT: Maximum usable frequencies (MUFs) were mainly near predicted monthly values with periods of minor to moderate enhancements for the Australian region on UT day 26 April. The Niue Island Region experienced minor MUF depressions during the local day. Sporadic E was observed over most sites. Mostly normal HF conditions are expected in the Australian regions for the next three UT days, 27-29 April. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 25 Apr Daily Proton Fluence >1 MeV: 6.0E+04 Daily Proton Fluence >10 MeV: 4.7E+04 Daily Electron Fluence >2 MeV: 2.70E+06 (normal fluence) Electron Fluence Daily Deep Dielectric Discharge Probability: 1% Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/27 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 27 APRIL AND FORECAST FOR 28 APRIL - 30 APRIL STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 27 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 27 Apr: 69/3 1B. SOLAR FORECAST 28 Apr 29 Apr 30 Apr Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 70/5 70/5 70/5 COMMENT: Solar activity was very low on UT day, 27 April. Very low levels of solar activity are expected for the next three UT days, 28-30 April. The visible disc has two regions with sunspots, AR2760 and SN62. No returning regions are expected. No Earth-bound CMEs were observed in available LASCO and STEREO images. During UT day 27 April, the solar wind speed varied between 370 and 450 km/s. The total IMF (Bt) varied in the range 3-7 nT and the north-south IMF component (Bz) varied between -5 to 3 nT. Solar wind parameters are expected to stay mostly at nominal values for the next three UT days, 28-30 April, with the possibility of occasional enhancements due to weak coronal hole influences. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 27 Apr: Quiet Estimated Indices 27 Apr : A K Australian Region 4 21102211 Cocos Island 3 11112210 Darwin 3 20102211 Townsville 4 21102211 Learmonth 6 21112321 Alice Springs 3 20102211 Gingin 6 21103320 Canberra 3 11102210 Hobart 4 21112210 Estimated Antarctic Regional K Indices 27 Apr : Macquarie Island 4 11103220 Casey 9 33223221 Mawson 23 44222553 Observed Regional daily pc3 Indices 27 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 0 (Quiet) Canberra 4 (Quiet) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 27 Apr : A Fredericksburg 7 Planetary 8 Observed AFr/Ap Indices 26 Apr : A K Fredericksburg 5 Planetary 6 0212 2212 2B. MAGNETIC FORECAST Date Ap Conditions 28 Apr 7 Quiet 29 Apr 7 Quiet 30 Apr 7 Quiet COMMENT: On UT day 27 April, the geomagnetic conditions in the Australian region were mainly at quiet levels. The Antarctic region observed quiet to unsettled levels, with Mawson station observing periods of active and minor storm levels. Global geomagnetic conditions are expected to stay mainly at quiet levels for the next three UT days, 28-30 April, with a chance of isolated unsettled periods due to weak coronal hole influences. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 27 Apr Normal Normal Normal-fair PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 28 Apr Normal Normal Normal-fair 29 Apr Normal Normal Normal-fair 30 Apr Normal Normal Normal-fair COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values with periods of minor to moderate enhancements on UT day 27 April. Mostly normal HF conditions are expected for the next three UT days, 28-30 April. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 27 Apr 12 Observed Australian Regional MUFs Cocos Island Region: Enhanced by 20% during local day. Enhanced by 55% during local night. Enhanced by 20% after local dawn. Niue Island Region: Near predicted monthly values during local day. Enhanced by 45% during local night. Northern Australian Region: Near predicted monthly values during local day. Enhanced by 35% during local night. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 60% during local night. Antarctic Region (Casey/Scott Base/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 28 Apr 4 Near to 15% above predicted monthly values 29 Apr 4 Near to 15% above predicted monthly values 30 Apr 4 Near to 15% above predicted monthly values COMMENT: Maximum usable frequencies (MUFs) were mainly near predicted monthly values with periods of minor to moderate enhancements for the Australian region on UT day 27 April. Sporadic E layers were observed over most sites. Mostly normal HF propagation conditions are expected in the Australian regions for the next three UT days, 28-30 April. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 26 Apr Daily Proton Fluence >1 MeV: 9.1E+04 Daily Proton Fluence >10 MeV: 4.6E+04 Daily Electron Fluence >2 MeV: 3.20E+06 (normal fluence) Electron Fluence Daily Deep Dielectric Discharge Probability: 1% Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/28 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 28 APRIL AND FORECAST FOR 29 APRIL - 01 MAY STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 28 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 28 Apr: 69/3 1B. SOLAR FORECAST 29 Apr 30 Apr 01 May Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 70/5 70/5 70/5 COMMENT: Solar activity was very low on UT day 28 April. Very low levels of solar activity are expected for the next three UT days, 29 April to 01 May. The visible disc has two numbered regions, AR2760 and AR2761. No returning regions are expected. No Earth-bound CMEs were observed in the available LASCO and STEREO images. During UT day 28 April, the solar wind speed varied between 370 and 430 km/s. The total IMF (Bt) varied in the range 3-5 nT and the north-south IMF component (Bz) varied between -4 and +3 nT. The solar wind speed is expected to stay mostly near its background values for the next three UT days, 29 April to 01 May, with the possibility of occasional enhancements due to weak coronal hole influences. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 28 Apr: Quiet Estimated Indices 28 Apr : A K Australian Region 3 21111201 Cocos Island 2 11111101 Darwin 3 21111201 Townsville 4 21121201 Learmonth 3 11111201 Alice Springs 3 21111201 Gingin 3 21011201 Canberra 2 11021200 Hobart 3 11022201 Estimated Antarctic Regional K Indices 28 Apr : Macquarie Island 4 10032200 Casey 6 23221211 Mawson 17 53221334 Observed Regional daily pc3 Indices 28 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 0 (Quiet) Canberra 0 (Quiet) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 28 Apr : A Fredericksburg 6 Planetary 8 Observed AFr/Ap Indices 27 Apr : A K Fredericksburg 6 Planetary 7 3211 1222 2B. MAGNETIC FORECAST Date Ap Conditions 29 Apr 7 Quiet 30 Apr 7 Quiet 01 May 7 Quiet COMMENT: On UT day 28 April, the geomagnetic conditions in the Australian region were at quiet levels. The Antarctic region observed mostly quiet to unsettled levels, with Mawson station observing periods of active and minor storm levels. Global geomagnetic conditions are expected to stay mainly at quiet levels for the next three UT days, 29 April to 01 May, with a chance of isolated unsettled periods due to weak coronal hole influences. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 28 Apr Normal Normal Normal-fair PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 29 Apr Normal Normal Normal-fair 30 Apr Normal Normal Normal-fair 01 May Normal Normal Normal-fair COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values with periods of minor to moderate enhancements on UT day 28 April. Mostly normal HF conditions are expected for the next three UT days, 29 April to 01 May. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 28 Apr 9 Observed Australian Regional MUFs Cocos Island Region: Enhanced by 20% during local day. Enhanced by 80% during local night. Niue Island Region: Depressed by 15% during local day. Enhanced by 20% during local night. Northern Australian Region: Near predicted monthly values during local day. Enhanced by 35% during local night. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 40% during local night. Antarctic Region (Casey/Scott Base/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 29 Apr 4 Near to 15% above predicted monthly values 30 Apr 4 Near to 15% above predicted monthly values 01 May 4 Near to 15% above predicted monthly values COMMENT: Maximum usable frequencies (MUFs) were mainly near predicted monthly values with periods of minor to moderate enhancements for the Australian regions on UT day 28 April. Sporadic E layers were observed over most sites. Mostly normal HF propagation conditions are expected in the Australian regions for the next three UT days, 29 April to 01 May. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 27 Apr Daily Proton Fluence >1 MeV: 5.6e+04 Daily Proton Fluence >10 MeV: 4.7e+04 Daily Electron Fluence >2 MeV: 1.90e+06 Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT ISSUED AT 2330UT/29 APRIL 2020 BY Space Weather Services FROM THE AUSTRALIAN SPACE FORECAST CENTRE SUMMARY FOR 29 APRIL AND FORECAST FOR 30 APRIL - 02 MAY STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity 29 Apr: Very low Flares: none. Observed 10.7 cm flux/Equivalent Sunspot Number for 29 Apr: 70/5 1B. SOLAR FORECAST 30 Apr 01 May 02 May Activity Very low Very low Very low Fadeouts None expected None expected None expected 10.7cm/SSN 70/5 70/5 70/5 COMMENT: Solar activity was very low on UT day 29 April. Very low levels of solar activity are expected for the next three UT days, 30 April to 02 May. The visible disc has two numbered regions, AR2760 and AR2761. No returning regions are expected. No Earth-bound CMEs were observed in the available LASCO and STEREO images. During UT day 29 April, the solar wind speed has decreased from 380 km/s to 320 km/s. The total IMF (Bt) varied in the range 2-4 nT and the north-south IMF component (Bz) varied between -2 and +1 nT. The solar wind speed is expected to stay mostly near its background values for the next three UT days, 30 April to 02 May, with the possibility of occasional enhancements due to weak coronal hole influences. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field for Australian Region 29 Apr: Quiet Estimated Indices 29 Apr : A K Australian Region 1 11000011 Cocos Island 1 11000010 Darwin 1 11000011 Townsville 2 11000012 Learmonth 0 10000010 Alice Springs 0 00000001 Gingin 0 00000020 Canberra 0 00000000 Hobart 1 01001010 Estimated Antarctic Regional K Indices 29 Apr : Macquarie Island 0 00000000 Casey 3 23100010 Mawson 11 33111243 Observed Regional daily pc3 Indices 29 Apr : Darwin 0 (Quiet) Townsville 0 (Quiet) Learmonth 0 (Quiet) Alice Springs 0 (Quiet) Gingin 0 (Quiet) Canberra 0 (Quiet) Melbourne NA Pc3 pulsations are high frequency (10-45 second period) variations of the Earths magnetic field. Daily pc3-indices are the daily sum of 20 minute pc3-indices for that station and have been shown to be well correlated with rejection of high resolution aeromagnetic survey flight-line data. NOTE: Indices may have been generated from data obtained in cooperation with the following organisations: Geoscience Australia, University of Newcastle Space Physics Group, Australian Government Antarctic Division and International Center for Space Weather Science and Education, Japan. Estimated AFr/Ap Indices 29 Apr : A Fredericksburg 5 Planetary 7 Observed AFr/Ap Indices 28 Apr : A K Fredericksburg 6 Planetary 5 3101 1211 2B. MAGNETIC FORECAST Date Ap Conditions 30 Apr 7 Quiet 01 May 7 Quiet 02 May 7 Quiet COMMENT: On UT day 29 April, the geomagnetic activity in the Australian region was at quiet levels. The Antarctic region observed mostly quiet levels, with Mawson station observing unsettled to active periods. Global geomagnetic activity is expected to stay mainly at quiet levels for the next three UT days, 30 April to 02 May, with a chance of isolated unsettled periods due to weak coronal hole influences. ----------------------------------------------------------- 3A. GLOBAL HF PROPAGATION SUMMARY Latitude Band Date Low Middle High 29 Apr Normal Normal Normal-fair PCA Event : No event. 3B. GLOBAL HF PROPAGATION FORECAST Latitude Band Date Low Middle High 30 Apr Normal Normal Normal-fair 01 May Normal Normal Normal-fair 02 May Normal Normal Normal-fair COMMENT: Maximum usable frequencies (MUFs) were near predicted monthly values with periods of minor to moderate enhancements on UT day 29 April. Mostly normal HF conditions are expected for the next three UT days, 30 April to 02 May. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY Date T index 29 Apr 4 Observed Australian Regional MUFs Cocos Island Region: Enhanced by 50% during local day. Enhanced by 70% during local night. Niue Island Region: Near predicted monthly values during local day. Enhanced by 20% during local night. Northern Australian Region: Near predicted monthly values during local day. Enhanced by 25% during local night. Southern Australian Region: Near predicted monthly values during local day. Enhanced by 25% during local night. Enhanced by 25% after local dawn. Antarctic Region (Casey/Scott Base/Davis/Mawson): Near predicted monthly values over the UT day. Monthly T index: Month T index Mar 1 Apr -14 May -14 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST Date T index MUFs 30 Apr 0 Near predicted monthly values 01 May 0 Near predicted monthly values 02 May 0 Near predicted monthly values COMMENT: Maximum usable frequencies (MUFs) were mainly near predicted monthly values with periods of minor to moderate enhancements for the Australian regions on UT day 29 April. Sporadic E layers were observed over most sites. Mostly normal HF propagation conditions are expected in the Australian regions for the next three UT days, 30 April to 02 May. ----------------------------------------------------------- 5. SPACE ENVIRONMENT SUMMARY GOES satellite data for 28 Apr Daily Proton Fluence >1 MeV: 5.5E+04 Daily Proton Fluence >10 MeV: 4.7E+04 Daily Electron Fluence >2 MeV: 1.90E+06 (normal fluence) Electron Fluence Daily Deep Dielectric Discharge Probability: 1% Fluence (flux accumulation over 24hrs)/ cm2-ster-day. X-ray background: