[Ips-dsgr] SWS Daily Report - 09 April 22 issued 2330 UT on 09 Apr 2022 [SEC=OFFICIAL]
Regional Warning Centre
rwc at ips.gov.au
Sun Apr 10 09:30:48 EST 2022
SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/09 APRIL 2022 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
ASWAS SCALE DESCRIPTION: https://www.sws.bom.gov.au
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1A. SOLAR SUMMARY
Activity 09 Apr: R0
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 09 Apr: 107/57
1B. SOLAR FORECAST
10 Apr 11 Apr 12 Apr
Activity R0 R0 R0
Fadeouts None expected None expected None expected
10.7cm/SSN 105/54 102/50 100/48
COMMENT: On UT day 9 Apr, solar activity was at R0 level, with
three C-class flares from region 2978(S18W85). This region remains
the largest and the most active on the visible disk. All other
regions are small and simple. Solar activity is expected to be
at R0 level on 10-12 Apr. SDO imagery observed a large filament
lift off from the south around 09/0500 UT. In addition some small
filament segments may have also erupted in the solar NE and SE
quadrants. These are not considered to be geoeffective. A weak
indistinct shock was observed in the solar wind parameters at
08/2300T. This could be the anticipated glancing blow from the
04 Apr CMEs. The solar wind speed range on 09 Apr was 320-400km/s.
The peak total interplanetary magnetic field (IMF) strength was
15 nT and the IMF north-south component (Bz) was predominately
negative up to -11 nT. Solar wind conditions are expected to
be enhanced on 10-12 Apr due to coronal hole effects and mild
CME impacts.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 09 Apr: G0
Estimated Indices 09 Apr : A K
Australian Region 13 23333421
Darwin 11 23223421
Townsville 14 33333421
Learmonth 14 33233431
Alice Springs 12 23233421
Gingin 12 32233430
Canberra 11 23333320
Hobart 12 23433320
Estimated Antarctic Regional K Indices 09 Apr :
Macquarie Island 24 13554520
Casey 9 33222231
Mawson 36 55643352
Observed Regional daily pc3 Indices 09 Apr :
Darwin 0 (Quiet)
Townsville 0 (Quiet)
Learmonth 0 (Quiet)
Alice Springs 0 (Quiet)
Gingin 0 (Quiet)
Canberra 0 (Quiet)
Hobart 0 (Quiet)
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 17
Planetary 22
Observed AFr/Ap Indices 08 Apr : A K
Fredericksburg 9
Planetary 9 3311 2322
2B. MAGNETIC FORECAST
Date Ap Conditions
10 Apr 15 G0-G1
11 Apr 15 G0-G1
12 Apr 10 G0
COMMENT: G0 geomagnetic conditions were observed in the Australian
region on UT day 9 Apr. G0 to G1 levels were observed in Antarctica.
G0 with possible G1 conditions expected on 10-12 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
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 Normal
12 Apr Normal Normal Normal
COMMENT: Normal HF propagation conditions are expected for 10-12
Apr.
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
09 Apr 83
Observed Australian Regional MUFs
Cocos Island Region:
Enhanced by 30% during local day.
Enhanced by 30% during local night.
Niue Island Region:
Enhanced by 30% during local day.
Enhanced by 45% during local night.
Enhanced by 25% after local dawn.
Northern Australian Region:
Enhanced by 15% during local day.
Enhanced by 15% 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):
Enhanced by 25% 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
10 Apr 70 Near to 15% above predicted monthly values
11 Apr 50 Near predicted monthly values
12 Apr 50 Near predicted monthly values
COMMENT: Maximum usable frequencies (MUFs) on UT day 9 Apr were
near monthly predicted values to mildly enhanced. Similar conditions
are likely on 10 Apr, with near monthly predicted values for
11-12 Apr.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 08 Apr
Daily Proton Fluence >1 MeV: 6.6E+04
Daily Proton Fluence >10 MeV: 3.8E+04
Daily Electron Fluence >2 MeV: 2.80E+06 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 1%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: B3.0
DSCOVR Satellite Solar Wind Day Averaged Data for 08 Apr
Speed: 366 km/sec Density: 6.3 p/cc Temp: 34100 K Bz: 4 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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