[Ips-dsgr] ASWFC Daily Report - 09 March 26 issued 2330 UT on 09 Mar 2026 [SEC=OFFICIAL]
Australian Space Weather Forecasting Centre
aswfc at bom.gov.au
Tue Mar 10 10:30:44 AEDT 2026
SUBJ: ASWFC DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/09 MARCH 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
SUMMARY FOR 09 MARCH AND FORECAST FOR 10 MARCH - 12 MARCH
STATUS INDICATORS SOL:** YELLOW ** MAG:GREEN ION: GREEN
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx
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1A. SOLAR SUMMARY
Activity 09 Mar: R0
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 09 Mar: 128/81
1B. SOLAR FORECAST
10 Mar 11 Mar 12 Mar
Activity R0, chance of R1 R0, chance of R1 R0, chance of R1
Fadeouts Possible Possible Possible
10.7cm/SSN 125/78 125/78 120/72
COMMENT: Solar flare activity on UT day 09-Mar was at the R0
level, with a C7.9 flare observed at 09/2038UT There are currently
four numbered sunspot regions on the solar disk. All are magnetically
simple and have no recent M-class flare production history. An
unnumbered region has developed at around S16W14, with beta magnetic
characteristics. All other regions are currently either stable
or in decay. Solar flare activity is expected to be at the R0
level with a chance of R1 over 10-12 Mar. S0 solar radiation
storm conditions were observed on UT day 09-Mar. S0 solar radiation
storm conditions are expected over 10-12 Mar. No CMEs were observed
on UT day 09-Mar, although limited coronagraph imagery is currently
available. On disk eruptions were observed in GOES SUVI imagery
from 09/1052UT and 09/1140UT, however these are directed to the
west and are not expected to be geoeffective events. The solar
wind speed was in decline over the UT day 09-Mar, mostly ranging
between 410 and 525 km/s . The wind speed is currently at around
430 km/s. The peak total interplanetary field strength (IMF,
Bt) was 6 nT and the north-south IMF component range (Bz) was
+5 to -5 nT. The solar wind speed is expected to continue to
decline towards background levels over 10-12 Mar.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 09 Mar: G0
Estimated Indices 09 Mar : A K
Australian Region 5 21112222
Cocos Island 3 21101220
Darwin 5 21111222
Townsville 5 21112222
Learmonth 7 22112232
Alice Springs 4 10112222
Gingin 6 21122231
Canberra 5 20122222
Kennaook Cape Grim 6 21122222
Hobart 6 21122222
Estimated Antarctic Regional K Indices 09 Mar :
Macquarie Island 10 11134322
Casey 21 35533232
Mawson 26 43213356
Observed Regional daily pc3 Indices 09 Mar :
Darwin 0 (Quiet)
Townsville 0 (Quiet)
Learmonth 0 (Quiet)
Alice Springs 0 (Quiet)
Gingin 8 (Quiet)
Canberra 8 (Quiet)
Hobart 12 (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 Mar : A
Fredericksburg 7
Planetary 6
Observed AFr/Ap Indices 08 Mar : A K
Fredericksburg 14
Planetary 22 5443 4432
2B. MAGNETIC FORECAST
Date Ap Conditions
10 Mar 7 G0
11 Mar 7 G0
12 Mar 5 G0
COMMENT: G0 geomagnetic conditions were observed in the Australian
region on UT day 09-Mar. Mostly G1 conditions were observed in
the Antarctic region, with G2 conditions observed at Mawson.
G0 geomagnetic conditions are expected over 10-12 Mar.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
09 Mar Normal Normal Normal
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
10 Mar Normal Normal Normal-fair
11 Mar Normal Normal Normal-fair
12 Mar Normal Normal Normal
COMMENT: HF radio propagation conditions on UT day 09-Mar were
mostly normal. Propagation conditions are expected to be mostly
normal over 10-12 Mar.
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
09 Mar 96
Observed Australian Regional MUFs
Cocos Island Region:
Near predicted monthly values.
Niue Island Region:
Enhanced by 45% during local day.
Enhanced by 30% during local night.
Northern Australian Region:
Enhanced by 20% during local day.
Near predicted monthly values during local night.
Southern Australian Region:
Near predicted monthly values.
Antarctic Region (Casey/Davis/Mawson):
Near predicted monthly values over the UT day.
Monthly T index:
Month T index
Feb 98
Mar 87
Apr 85
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
10 Mar 95 Near predicted monthly values
11 Mar 95 Near predicted monthly values
12 Mar 95 Near predicted monthly values
COMMENT: Maximum usable frequencies (MUFs) in the Australian
region on UT day 09-Mar were near predicted monthly values. Spread
F was observed at Hobart during local night hours. MUFs are expected
to be near predicted values over 10-12 Mar.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 08 Mar
Daily Proton Fluence >1 MeV: 6.4E+05
Daily Proton Fluence >10 MeV: 1.6E+04
Daily Electron Fluence >2 MeV: 4.00E+07 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 6%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: B5.4
DSCOVR Satellite Solar Wind Day Averaged Data for 08 Mar
Speed: 536 km/sec Density: 2.1 p/cc Temp: 179000 K Bz: -1 nT
(Courtesy Space Weather Prediction Center, Boulder USA)
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Australian Space Weather Forecasting Centre
Bureau of Meteorology
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au
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