[Ips-dsgr] ASWFC Daily Report - 04 March 26 issued 2330 UT on 04 Mar 2026 [SEC=OFFICIAL]
Australian Space Weather Forecasting Centre
aswfc at bom.gov.au
Thu Mar 5 10:30:49 AEDT 2026
SUBJ: ASWFC DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/04 MARCH 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
SUMMARY FOR 04 MARCH AND FORECAST FOR 05 MARCH - 07 MARCH
STATUS INDICATORS SOL:** YELLOW ** MAG:GREEN ION: GREEN
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx
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1A. SOLAR SUMMARY
Activity 04 Mar: R0
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 04 Mar: 141/95
1B. SOLAR FORECAST
05 Mar 06 Mar 07 Mar
Activity R0, chance of R1 R0, chance of R1 R0, chance of R1
Fadeouts Possible Possible Possible
10.7cm/SSN 142/96 142/96 138/92
COMMENT: Solar flare activity on UT day 04-Mar was at the R0
level, with a C3.9 flare at 04/0308UT the largest flare of the
UT day. There are currently four numbered sunspot regions on
the solar disk. AR4378 (N16W11, beta) and AR4385 (S08E33, beta)
both showed minor spot development over the UT day and AR4384
(N10E39, beta) was stable but was responsible for the largest
flare of the day. The other numbered region appeared in decay.
An unnumbered region is present at N12E23 with beta magnetic
classification and is in decay. Solar flare activity is expected
to be at the R0 level, with a chance of R1 over 05-07 Mar. S0
solar radiation storm conditions were observed on UT day 04-Mar.
S0 solar radiation storm conditions are expected over 05-07 Mar.
No geoeffective CMEs were observed on UT day 04-Mar. A disappearing
solar filament is visible at around S24E65 from 04/0052UT in
H-Alpha imagery. A narrow, southeast directed, CME is visible
in SOHO imagery from 04/0212UT. This CME is not considered geoeffective.
The solar wind environment on UT day 04-Mar was steady. The solar
wind speed mostly ranged between 380 and 460 km/s and is currently
at around 430 km/s. The peak total interplanetary field strength
(IMF, Bt) was 5 nT and the north-south IMF component (Bz) was
+4 to -4 nT. The solar wind speed is expected to continue to
remain near background levels over 05-06 Mar. An increase is
expected from 07-Mar due to an equatorial coronal hole rotating
towards a geoeffective position.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 04 Mar: G0
Estimated Indices 04 Mar : A K
Australian Region 5 22221112
Cocos Island 4 22121110
Darwin 6 32121112
Townsville 8 2-421122
Learmonth 6 32221111
Alice Springs 4 22221002
Gingin 6 32121121
Canberra 4 22121012
Kennaook Cape Grim 6 22231112
Hobart 5 22221112
Estimated Antarctic Regional K Indices 04 Mar :
Macquarie Island 7 33231011
Casey 17 45432122
Mawson 13 34333222
Observed Regional daily pc3 Indices 04 Mar :
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 04 Mar : A
Fredericksburg 7
Planetary 8
Observed AFr/Ap Indices 03 Mar : A K
Fredericksburg 14
Planetary 16 1322 2335
2B. MAGNETIC FORECAST
Date Ap Conditions
05 Mar 5 G0
06 Mar 5 G0
07 Mar 12 G0, chance of G1
COMMENT: G0 geomagnetic conditions were observed in the Australian
region on UT day 04-Mar. Mostly G0 geomagnetic conditions were
observed in the Antarctic region, with a period of G1 observed
at Casey. G0 geomagnetic conditions are expected on 05-06 Mar.
G0 conditions, with a chance of G1 are expected on 07-Mar due
to anticipated coronal hole high speed wind stream effects.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
04 Mar Normal Normal Normal-fair
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
05 Mar Normal Normal Normal
06 Mar Normal Normal Normal
07 Mar Normal Normal Normal-fair
COMMENT: HF radio propagation conditions on UT day 04-Mar were
generally normal. HF radio propagation conditions over 05-07
Mar are expected to be mostly normal.
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
04 Mar 110
Observed Australian Regional MUFs
Cocos Island Region:
Mostly near predicted monthly values.
Enhanced by 20% after local dawn.
Niue Island Region:
Enhanced by 35% during local day.
Enhanced by 30% during local night.
Northern Australian Region:
Enhanced by 15% during local day.
Near predicted monthly values during local night.
Southern Australian Region:
Enhanced by 15% during local day.
Near predicted monthly values during local night.
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
05 Mar 110 Near to 15% above predicted monthly values
06 Mar 110 Near to 15% above predicted monthly values
07 Mar 110 Near to 15% above predicted monthly values
COMMENT: Maximum usable frequencies (MUFs) in the Australian
region were near predicted monthly values to 15% enhanced during
local daylight hours on 04-Mar. MUFs are expected to be near
predicted values to 15% enhanced over 05-07 Mar.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 03 Mar
Daily Proton Fluence >1 MeV: 3.1E+06
Daily Proton Fluence >10 MeV: 1.5E+04
Daily Electron Fluence >2 MeV: 9.80E+07 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability:10%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: B5.8
DSCOVR Satellite Solar Wind Day Averaged Data for 03 Mar
Speed: 391 km/sec Density: 3.0 p/cc Temp: 114000 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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