[Ips-dsgr] SWS Daily Report - 10 April 22 issued 2330 UT on 10 Apr 2022 [SEC=OFFICIAL]
Regional Warning Centre
rwc at ips.gov.au
Mon Apr 11 09:30:51 EST 2022
SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/10 APRIL 2022 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
ASWAS SCALE DESCRIPTION: https://www.sws.bom.gov.au
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1A. SOLAR SUMMARY
Activity 10 Apr: R0
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 10 Apr: 101/49
1B. SOLAR FORECAST
11 Apr 12 Apr 13 Apr
Activity R0 R0 R0
Fadeouts None expected None expected None expected
10.7cm/SSN 98/45 95/41 95/41
COMMENT: On UT day 10 Apr, solar activity was at R0 level, with
a C4.9 flare from region 2978 on the west limb. There is currently
one numbered region on the visible disk. Solar activity is expected
to be at R0 level on 11-13 Apr. On UT day 10 Apr, the solar wind
parameters were disturbed due to combined effects of weak CME
and coronal hole HSS. Solar wind speed increased gradually to
520 Km/s. The total interplanetary magnetic field (IMF) peaked
at 19 nT and the IMF north-south component (Bz) varied between
+/-15 nT with a prolonged southward period between 10/0200-0900UT.
Solar wind conditions are expected to be enhanced on 11-13 Apr
due to coronal hole effects and mild CME impacts.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 10 Apr: G1
Estimated Indices 10 Apr : A K
Australian Region 13 25332221
Darwin 14 35332211
Townsville 14 35332212
Learmonth 16 35332322
Alice Springs 13 25332211
Gingin 13 34332322
Canberra 16 25442221
Hobart 17 15442321
Estimated Antarctic Regional K Indices 10 Apr :
Macquarie Island 32 26564311
Casey 23 46442222
Mawson 74 38632367
Observed Regional daily pc3 Indices 10 Apr :
Darwin 0 (Quiet)
Townsville 0 (Quiet)
Learmonth 3 (Quiet)
Alice Springs 0 (Quiet)
Gingin 13 (Quiet)
Canberra 11 (Quiet)
Hobart 34 (Quiet to unsettled)
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 24
Planetary 35
Observed AFr/Ap Indices 09 Apr : A K
Fredericksburg 17
Planetary 20 3343 3532
2B. MAGNETIC FORECAST
Date Ap Conditions
11 Apr 15 G0-G1
12 Apr 12 G0
13 Apr 10 G0
COMMENT: SWS Geomagnetic Warning 20 was issued on 10 April and
is current for 10-11 Apr. G1 geomagnetic conditions were observed
in the Australian region on UT day 10 Apr. G2 levels were observed
in Antarctica. G0 with possible G1 conditions expected on 11-13
Apr due to coronal hole effects and possible weak CME impacts.
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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-fair Normal-fair
12 Apr Normal Normal-fair Normal-fair
13 Apr Normal Normal Normal
COMMENT: Mild to moderate MUF degradations may be observed on
11-12 Apr due increased geomagnetic activity.
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
10 Apr 78
Observed Australian Regional MUFs
Cocos Island Region:
Enhanced by 25% during local day.
Near predicted monthly values during local night.
Niue Island Region:
Enhanced by 20% during local day.
Near predicted monthly values during local night.
Northern Australian Region:
Enhanced by 15% during local day.
Enhanced by 25% during local night.
Southern Australian Region:
Enhanced by 15% 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 64
Apr 46
May 49
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
11 Apr 45 Near predicted monthly values/depressed 10 to
20%
12 Apr 45 Near predicted monthly values/depressed 10 to
20%
13 Apr 60 Near predicted monthly values
COMMENT: Maximum usable frequencies (MUFs) on UT day 10 Apr were
near monthly predicted values to slightly enhanced. Mild to moderate
MUF degradations may be observed at high to mid latitude regions
on 11-12 Apr due increased geomagnetic activity.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 09 Apr
Daily Proton Fluence >1 MeV: 1.7E+05
Daily Proton Fluence >10 MeV: 3.9E+04
Daily Electron Fluence >2 MeV: 5.20E+06 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 1%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: B3.4
DSCOVR Satellite Solar Wind Day Averaged Data for 09 Apr
Speed: 375 km/sec Density: 10.7 p/cc Temp: 35200 K Bz: -3 nT
(Courtesy Space Weather Prediction Center, Boulder USA)
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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
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