From aswfc at bom.gov.au Thu Dec 4 12:29:09 2025 From: aswfc at bom.gov.au (Australian Space Weather Forecasting Centre) Date: Thu, 04 Dec 2025 12:29:09 +1100 Subject: [Ips-wgr] ASWFC Weekly Geo. Report (04 December 25) issued 0129 UT on 04 Dec 2025 [SEC=OFFICIAL] Message-ID: <6930e3e5.Mxn9PJATx0ZCYlVV%aswfc@bom.gov.au> SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 04 DECEMBER 2025 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (25 NOVEMBER - 03 DECEMBER) K indices are in UT (0-24). For conversion to local time: AEST = UT + 10 hours; ACST = UT + 9.5 hours; AWST = UT + 8 hours Australian Region* Date K-INDICES A 25 Nov 3335 4433 22 26 Nov 3333 5322 17 27 Nov 2233 4323 13 In the BOM magnetometer data for 27 Nov, a weak (18nT) impulse was observed at 1200UT. 28 Nov 3234 3332 14 29 Nov 2333 3323 13 30 Nov 3222 1222 7 01 Dec 2221 3211 6 02 Dec 2221 1222 6 03 Dec 1123 5445 22 *estimated from real time 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. In the Australian regional field G1 periods were observed on 25-Nov, 26-Nov and 03-Dec in association with coronal hole high speed solar wind streams. Planetary G3 conditions were observed 03/1800-2100UT. Planetary G1 conditions were observed on 25 Nov and 27-Nov. 2. FORECAST (04 DECEMBER - 03 JANUARY) Disturbed Periods: 4-5 Dec, 21-23 Dec, 30 Dec - 01 Jan. Best Quiet Periods: 8-12 Dec, 14-17 Dec, 19-Dec, 28-Dec. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Mildly Disturbed Periods: 22-23 Dec Best Quiet Periods: 8-11 Dec, 15-20 Dec 28-30 Dec Central Australian Regions: Disturbed Periods: 22-23 Dec Mildly disturbed: 04-05 Dec, 12-Dec, 21-Dec, 24-26 Dec Best Quiet Periods: 8-10 Dec, 16-19 Dec and 29-Dec. Southern Australian Regions: Disturbed Periods: 04-05 Dec, 12-13 Dec, 21-27 Dec. Best Quiet Periods: 9-10 Dec, 16-19 Dec and 29-Dec. 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. PLEASE NOTE: Geomagnetic activity can frequently be determined by short timescale solar events that cannot be forecast a week in advance, particularly at solar maximum. Australian Space Weather Forecasting Centre Bureau of Meteorology ASWFC at bom.gov.au www.bom.gov.au | www.sws.bom.gov.au From aswfc at bom.gov.au Thu Dec 11 12:13:43 2025 From: aswfc at bom.gov.au (Australian Space Weather Forecasting Centre) Date: Thu, 11 Dec 2025 12:13:43 +1100 Subject: [Ips-wgr] ASWFC Weekly Geo. Report (11 December 25) issued 0113 UT on 11 Dec 2025 [SEC=OFFICIAL] Message-ID: <693a1ac7.25l8YIZq3mw8TyVo%aswfc@bom.gov.au> SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 11 DECEMBER 2025 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (02 DECEMBER - 10 DECEMBER) K indices are in UT (0-24). For conversion to local time: AEST = UT + 10 hours; ACST = UT + 9.5 hours; AWST = UT + 8 hours Australian Region* Date K-INDICES A 02 Dec 2221 1222 6 03 Dec 1123 5445 22 04 Dec 3334 4333 18 05 Dec 3332 2232 11 06 Dec 3332 2222 10 07 Dec 2222 2111 5 08 Dec 1210 0011 2 09 Dec 1011 1112 3 10 Dec 2231 2345 16 *estimated from real time 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. G1 on 3-Dec due to coronal hole high speed wind stream effects and 10-Dec due to coronal mass ejection arrival. G0 on other days. 2. FORECAST (11 DECEMBER - 10 JANUARY) Disturbed Periods: 11-14 Dec, 22-24 Dec, 30 Dec to 1 Jan. Best Quiet Periods: 16-18 Dec, 4-5 Jan. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Mildly Disturbed Periods: 22-23 Dec. Best Quiet Periods: 15-19 Dec, 29-Dec, 4-6 Jan. Central Australian Regions: Disturbed Periods: 22-23 Dec. Mildly Disturbed Periods: 11-14 Dec, 21 Dec 24-26 Dec, 31-Dec, 01-02 Jan Best Quiet Periods: 16-19 Dec, 29-Dec, 4-6 Jan. Southern Australian Regions: Disturbed Periods: 11-14 Dec, 21-26 Dec, 31-Dec, 01-02 Jan Best Quiet Periods: 16-19 Dec, 29-Dec, 4-6 Jan. 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. PLEASE NOTE: Geomagnetic activity can frequently be determined by short timescale solar events that cannot be forecast a week in advance, particularly at solar maximum. Australian Space Weather Forecasting Centre Bureau of Meteorology ASWFC at bom.gov.au www.bom.gov.au | www.sws.bom.gov.au From aswfc at bom.gov.au Thu Dec 18 11:51:40 2025 From: aswfc at bom.gov.au (Australian Space Weather Forecasting Centre) Date: Thu, 18 Dec 2025 11:51:40 +1100 Subject: [Ips-wgr] ASWFC Weekly Geo. Report (18 December 25) issued 0051 UT on 18 Dec 2025 [SEC=OFFICIAL] Message-ID: <6943501c.pwgTQQ1PjRHnyJXq%aswfc@bom.gov.au> SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 18 DECEMBER 2025 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (09 DECEMBER - 17 DECEMBER) K indices are in UT (0-24). For conversion to local time: AEST = UT + 10 hours; ACST = UT + 9.5 hours; AWST = UT + 8 hours Australian Region* Date K-INDICES A 09 Dec 1011 1112 3 10 Dec 2231 2345 16 11 Dec 4322 2552 20 In the BOM magnetometer data for 11 Dec, a weak (24nT) impulse was observed at 1500UT. 12 Dec 3334 4355 26 13 Dec 3222 3322 10 14 Dec 1212 1121 4 15 Dec 1122 3111 5 16 Dec 3222 2322 9 17 Dec 3222 3233 11 *estimated from real time 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. In the Australian region G1 periods were observed on 10-Dec, 11-Dec and 12-Dec. Indistinct glancing CME arrivals were observed over 10-11 Dec with a possible corotating interaction region on 12-Dec prior to the Earth entering a coronal hole high speed wind stream. Planetary conditions briefly reached G2 on 10-11 Dec and reached G1 on 12,13 and 18-Dec. G0 conditions were observed on other days of the week. 2. FORECAST (18 DECEMBER - 17 JANUARY) Disturbed Periods: 18 Dec, 21-24 Dec, 26-27 Dec, 30-31 Dec, 7-8 Jan. Best Quiet Periods: 4-5 Jan, 10-11 Jan. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Mildly Disturbed Periods: 22-23 Dec. Best Quiet Periods: 18-20 Dec, 28-30 Dec, 03-11 Jan, 14-16 Jan. Central Australian Regions: Disturbed Periods: 22-23 Dec Mildly Disturbed: 21-Dec, 24-27Dec, 31-Dec to 02-Jan, 09-10 Jan, 12-13 Jan. Best Quiet Periods: 19-Dec, 29-30 Dec, 04-07 Jan, 14-15 Jan. Southern Australian Regions: Disturbed Periods: 21-27Dec, 31-Dec to 02-Jan, 09-10 Jan, 12-13 Jan. Best Quiet Periods: 19-Dec, 29-Dec, 04-07 Jan, 14-15 Jan. 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. PLEASE NOTE: Geomagnetic activity can frequently be determined by short timescale solar events that cannot be forecast a week in advance, particularly at solar maximum. Australian Space Weather Forecasting Centre Bureau of Meteorology ASWFC at bom.gov.au www.bom.gov.au | www.sws.bom.gov.au From aswfc at bom.gov.au Thu Dec 25 12:04:28 2025 From: aswfc at bom.gov.au (Australian Space Weather Forecasting Centre) Date: Thu, 25 Dec 2025 12:04:28 +1100 Subject: [Ips-wgr] ASWFC Weekly Geo. Report (25 December 25) issued 0104 UT on 25 Dec 2025 [SEC=OFFICIAL] Message-ID: <694c8d9c.IUiu/D7J0yIPJIRC%aswfc@bom.gov.au> SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 25 DECEMBER 2025 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (16 DECEMBER - 24 DECEMBER) K indices are in UT (0-24). For conversion to local time: AEST = UT + 10 hours; ACST = UT + 9.5 hours; AWST = UT + 8 hours Australian Region* Date K-INDICES A 16 Dec 3222 2322 9 17 Dec 3222 3233 11 18 Dec 3233 2322 11 19 Dec 2211 1222 5 20 Dec 1121 2122 5 21 Dec 2334 4334 18 22 Dec 3233 4323 14 23 Dec 2333 4333 15 24 Dec 3333 3333 15 *estimated from real time 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. G0 geomagnetic conditions were observed in the Australian region this week. 2. FORECAST (25 DECEMBER - 24 JANUARY) Disturbed Periods: 25-27 Dec, 30-31 Dec, 6-8 Jan, 13-14 Jan, 17-23 Jan. Best Quiet Periods: 4-5 Jan, 10-11 Jan, 15-16 Jan. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Mildly Disturbed Periods: 18 Jan. Best Quiet Periods: 25 Dec to 16 Jan, 20-25 Jan. Central Australian Regions: Disturbed Periods: 18 Jan. Mildly Disturbed Periods: 25-27 Dec, 31 Dec to 02 Jan, 9-10 Jan, 12-15 Jan, 17 Jan, 19-23 Jan. Best Quiet Periods: 29 Dec, 4-7 Jan. Southern Australian Regions: Disturbed Periods: 25-27 Dec, 31 Dec to 02 Jan, 9-10 Jan, 12-15 Jan, 17-23 Jan. Best Quiet Periods: 29 Dec, 4-7 Jan. 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. PLEASE NOTE: Geomagnetic activity can frequently be determined by short timescale solar events that cannot be forecast a week in advance, particularly at solar maximum. Australian Space Weather Forecasting Centre Bureau of Meteorology ASWFC at bom.gov.au www.bom.gov.au | www.sws.bom.gov.au