[Ips-dsgr] ASWFC Daily Report - 28 January 26 issued 2330 UT on 28 Jan 2026 [SEC=OFFICIAL]
Australian Space Weather Forecasting Centre
aswfc at bom.gov.au
Thu Jan 29 10:30:48 AEDT 2026
SUBJ: ASWFC DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/28 JANUARY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
SUMMARY FOR 28 JANUARY AND FORECAST FOR 29 JANUARY - 31 JANUARY
STATUS INDICATORS SOL:** YELLOW ** MAG:GREEN ION: GREEN
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx
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1A. SOLAR SUMMARY
Activity 28 Jan: R0
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 28 Jan: 133/87
1B. SOLAR FORECAST
29 Jan 30 Jan 31 Jan
Activity R0, Chance R1 R0, Chance R1 R0, Chance R1
Fadeouts Possible Possible Possible
10.7cm/SSN 130/84 120/72 110/60
COMMENT: Solar flare activity was at the R0 level on UT day 28-Jan.
There are currently eight numbered sunspot regions visible on
the solar disk. Active Region (AR) 4349 (S14E44, alpha) is currently
the largest region on the solar disk but is showing simple magnetic
complexity. AR4357 (S13W17, beta) has shown mild growth over
the UT day. All other regions appear stable or in decay. Solar
flare activity is expected to remain at the R0 level, with a
chance of R1 over 29-31 Jan. Solar radiation storm conditions
were at the S0 level on UT day 28-Jan. S0 conditions are expected
for 29-31 Jan. No Earth-directed coronal mass ejections were
observed over the past 24 hours. The solar wind speed ranged
between 650-450 km/s across the UT day and is currently 630 km/s.
The interplanetary magnetic field strength (IMF, Bt) peaked at
13 nT during 28-Jan, with the North-South component (Bz) ranging
between -12 and +12 nT over the last UT day. The solar wind speed
is expected to remain mildly elevated over 29-30 Jan, due to
coronal hole high speed wind stream effects. The solar wind speed
is expected to return to background levels on 31-Jan.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 28 Jan: G0
Estimated Indices 28 Jan : A K
Australian Region 16 22234434
Cocos Island 11 21223423
Darwin 16 22234434
Townsville 17 13234434
Learmonth 19 22234534
Alice Springs 14 12234433
Gingin 16 22234434
Canberra 16 13334433
Kennaook Cape Grim 21 23335434
Hobart 21 23335434
Estimated Antarctic Regional K Indices 28 Jan :
Macquarie Island 40 13257633
Casey 37 34645445
Mawson 73 45445847
Observed Regional daily pc3 Indices 28 Jan :
Darwin 4 (Quiet)
Townsville 0 (Quiet)
Learmonth 0 (Quiet)
Alice Springs 0 (Quiet)
Gingin 33 (Quiet to unsettled)
Canberra 43 (Unsettled)
Hobart 55 (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 28 Jan : A
Fredericksburg 18
Planetary 22
Observed AFr/Ap Indices 27 Jan : A K
Fredericksburg 7
Planetary 10 2322 1233
2B. MAGNETIC FORECAST
Date Ap Conditions
29 Jan 12 G0, chance G1
30 Jan 12 G0, chance G1
31 Jan 8 G0
COMMENT: G0 geomagnetic conditions were observed in Australia
and a brief period of G4 has been observed in Antarctic regions.
G0 with chance of G1 geomagnetic conditions are expected over
29-30 Jan due to high speed wind stream effects from a geoeffective
coronal hole. G0 geomagnetic conditions are expected for 31-Jan.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
28 Jan Normal Normal Normal-fair
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
29 Jan Normal Normal Normal-fair
30 Jan Normal Normal Normal-fair
31 Jan Normal Normal Normal-fair
COMMENT: Global ionospheric conditions were mostly normal, with
only some minor degradations seen in the Americas during local
dawn. MUFs in the European region were near predicted values.
Ionospheric conditions are expected to remain Normal over 29-31
Jan, with some minor degradations possible due to coronal hole
high speed wind stream effects.
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
28 Jan 110
Observed Australian Regional MUFs
Cocos Island Region:
Near predicted monthly values during local day.
Enhanced by 15% during local night.
Enhanced by 20% after local dawn.
Niue Island Region:
Near predicted monthly values during local day.
Enhanced by 20% during local night.
Northern Australian Region:
Near predicted monthly values.
Southern Australian Region:
Mostly near predicted monthly values.
Depressed by 25% after local dawn.
Antarctic Region (Casey/Davis/Mawson):
Near predicted monthly values over the UT day.
Monthly T index:
Month T index
Dec 110
Jan 89
Feb 88
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
29 Jan 125 Near to 15% above predicted monthly values
30 Jan 115 Near to 15% above predicted monthly values
31 Jan 110 Near to 15% above predicted monthly values
COMMENT: Maximum Usable Frequencies (MUFs) in the Australian
region and Antarctic regions were near predicted monthly values
to 15% enhanced. MUFs are expected to be near predicted monthly
values to 15% enhanced over 29-31 Jan.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 27 Jan
Daily Proton Fluence >1 MeV: 3.8E+06
Daily Proton Fluence >10 MeV: 2.7E+04
Daily Electron Fluence >2 MeV: 3.00E+08 (moderate fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability:19%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: B8.4
DSCOVR Satellite Solar Wind Day Averaged Data for 27 Jan
Speed: 425 km/sec Density: 3.8 p/cc Temp: 88900 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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