[Ips-dsgr] ASWFC Daily Report - 10 March 26 issued 2330 UT on 10 Mar 2026 [SEC=OFFICIAL]
Australian Space Weather Forecasting Centre
aswfc at bom.gov.au
Wed Mar 11 10:30:49 AEDT 2026
SUBJ: ASWFC DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/10 MARCH 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
SUMMARY FOR 10 MARCH AND FORECAST FOR 11 MARCH - 13 MARCH
STATUS INDICATORS SOL:** YELLOW ** MAG:GREEN ION: GREEN
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx
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1A. SOLAR SUMMARY
Activity 10 Mar: R0
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 10 Mar: 127/80
1B. SOLAR FORECAST
11 Mar 12 Mar 13 Mar
Activity R0, chance of R1 R0, chance of R1 R0, chance of R1
Fadeouts Possible Possible Possible
10.7cm/SSN 125/78 120/72 115/66
COMMENT: Solar flare activity on UT day 10-Mar was at the R0
level. A C4.7 flare observed at 10/1845UT was the largest flare
of the day. There are currently five numbered sunspot regions
on the solar disk. All are magnetically simple and have no recent
M-class flare production history. AR4388 (S13W29, beta) and AR4389
(N13E63, beta) both showed spot development, although AR4388
showed decay in the latter half of the UT day. AR4381 (N09W65,
beta) was responsible for the largest flare of the day and was
in decay. An unnumbered region has developed on the solar disk
at around N28E30 with beta magnetic characteristics. All other
regions are currently in decay. Solar flare activity is expected
to be at the R0 level with a chance of R1 over 11-13 Mar. S0
solar radiation storm conditions were observed on UT day 10-Mar.
S0 solar radiation storm conditions are expected over 11-13 Mar.
No geoeffective CMEs were observed on UT day 10-Mar. A narrow,
northwest directed CME is visible in SOHO and STEREO-A imagery
from 10/1101UT. This CME is not considered geoeffective. The
solar wind speed increased over the UT day 10-Mar, mostly ranging
between 390 and 530 km/s. The wind speed is currently at around
505 km/s. The peak total interplanetary field strength (IMF,
Bt) was 9 nT and the north-south IMF component range (Bz) was
+6 to -8 nT. The solar wind speed is expected to remain at around
current levels on 11-Mar, with a decline likely over 12-13 Mar.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 10 Mar: G0
Estimated Indices 10 Mar : A K
Australian Region 7 22222321
Cocos Island 5 12122220
Darwin 9 22223322
Townsville 8 21223322
Learmonth 8 22223321
Alice Springs 7 21123321
Gingin 10 32222421
Canberra 7 22222321
Kennaook Cape Grim 8 22222331
Hobart 9 22222332
Estimated Antarctic Regional K Indices 10 Mar :
Macquarie Island 18 32244531
Casey 21 35433432
Mawson 38 54343742
Observed Regional daily pc3 Indices 10 Mar :
Darwin 0 (Quiet)
Townsville 0 (Quiet)
Learmonth 0 (Quiet)
Alice Springs 0 (Quiet)
Gingin 0 (Quiet)
Canberra 4 (Quiet)
Hobart 9 (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 10 Mar : A
Fredericksburg 13
Planetary 15
Observed AFr/Ap Indices 09 Mar : A K
Fredericksburg 5
Planetary 7 2212 2223
2B. MAGNETIC FORECAST
Date Ap Conditions
11 Mar 10 G0
12 Mar 7 G0
13 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 a period of G3 conditions observed
at Mawson. G0 geomagnetic conditions are expected over 11-13
Mar.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
10 Mar Normal Normal Normal-fair
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
11 Mar Normal Normal Normal-fair
12 Mar Normal Normal Normal
13 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 11-13 Mar.
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
10 Mar 107
Observed Australian Regional MUFs
Cocos Island Region:
Enhanced by 15% during local day.
Enhanced by 25% during local night.
Niue Island Region:
Enhanced by 30% during local day.
Enhanced by 15% 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.
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
11 Mar 105 Near to 15% above predicted monthly values
12 Mar 105 Near to 15% above predicted monthly values
13 Mar 105 Near to 15% above predicted monthly values
COMMENT: Maximum usable frequencies (MUFs) in the Australian
region on UT day 10-Mar were near predicted monthly values, with
mild enhancements observed in the northern Australian region.
Mild spread F was observed at Hobart during local night hours.
MUFs are expected to be near predicted monthly values to enhanced
by 15% over 11-13 Mar.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 09 Mar
Daily Proton Fluence >1 MeV: 1.3E+05
Daily Proton Fluence >10 MeV: 1.6E+04
Daily Electron Fluence >2 MeV: 4.50E+07 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 6%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: B5.3
DSCOVR Satellite Solar Wind Day Averaged Data for 09 Mar
Speed: 470 km/sec Density: 2.2 p/cc Temp: 81100 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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