[Ips-dsgr] ASWFC Daily Report - 23 January 26 issued 2330 UT on 23 Jan 2026 [SEC=OFFICIAL]
Australian Space Weather Forecasting Centre
aswfc at bom.gov.au
Sat Jan 24 10:30:58 AEDT 2026
SUBJ: ASWFC DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/23 JANUARY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
SUMMARY FOR 23 JANUARY AND FORECAST FOR 24 JANUARY - 26 JANUARY
STATUS INDICATORS SOL:** YELLOW ** MAG:** YELLOW ** ION: GREEN
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx
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1A. SOLAR SUMMARY
Activity 23 Jan: R0
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 23 Jan: 180/133
1B. SOLAR FORECAST
24 Jan 25 Jan 26 Jan
Activity R0-R1 R0-R1 R0-R1
Fadeouts Possible Possible Possible
10.7cm/SSN 185/138 190/143 185/138
COMMENT: Solar flare activity on UT day 23-Jan was at the R0
level, with several C-class flares observed. There are currently
eight numbered sunspot regions and one unnumbered region visible
on the solar disk. AR4349 (S14E28, beta) is the largest region
on the disk and has exhibited growth in its trailer spots over
the UT day. An unnumbered region recently appeared near S09E52
(alpha) and is stable. All other sunspot regions are either stable
or in decay. Solar flare activity is expected to be at R0-R1
levels over 24-26 Jan. S0 solar proton conditions were observed
on UT day 23-Jan, with the proton flux continuing a gradual decline
over the UT day. S0 solar proton conditions are expected over
24-26 Jan, with a chance of S1. No Earth-directed coronal mass
ejections (CMEs) have been observed. A south-directed CME was
observed, visible in LASCO C2 coronagraph imagery at 23/1524UT.
This CME is considered a farside event and not geoeffective.
A southeast-directed CME was observed at 23/1812UT. This CME
is likely associated with a limb prominence eruption visible
in GOES SUVI imagery from 23/1444UT and is not considered geoeffective.
The solar wind speed on UT day 23-Jan mildly increased, ranging
from 490 to 610 km/s and is currently near 550 km/s. The peak
total interplanetary magnetic field strength (IMF, Bt) was 9
nT and the north-south IMF component (Bz) range was -8 to +6
nT. The solar wind speed is expected to remain elevated over
24-26 Jan.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 23 Jan: G1
Estimated Indices 23 Jan : A K
Australian Region 18 33253432
Cocos Island 11 32231431
Darwin 14 32243333
Townsville 13 32243332
Learmonth 19 33252442
Alice Springs 16 32253332
Gingin 18 33253432
Canberra 17 33253332
Kennaook Cape Grim 21 33354432
Hobart 21 33354432
Estimated Antarctic Regional K Indices 23 Jan :
Macquarie Island 47 33475652
Casey 30 46543333
Mawson 68 56654765
Observed Regional daily pc3 Indices 23 Jan :
Darwin 0 (Quiet)
Townsville 0 (Quiet)
Learmonth 0 (Quiet)
Alice Springs 0 (Quiet)
Gingin 12 (Quiet)
Canberra 10 (Quiet)
Hobart 49 (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 23 Jan : A
Fredericksburg 21
Planetary 30
Observed AFr/Ap Indices 22 Jan : A K
Fredericksburg 15
Planetary 19 4332 2225
2B. MAGNETIC FORECAST
Date Ap Conditions
24 Jan 18 G0-G1
25 Jan 10 G0
26 Jan 8 G0
COMMENT: G1 geomagnetic conditions were observed in the Australian
region on UT day 23-Jan. Mostly G2 geomagnetic conditions were
observed in the Antarctic region, with isolated periods of G3
observed at Mawson and Macquarie Island. G0-G1 geomagnetic conditions
are expected on 24-Jan due to ongoing elevated solar wind conditions.
G0 geomagnetic conditions are expected over 25-26 Jan.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
23 Jan Normal Normal Fair
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
24 Jan Normal Normal-fair Fair
25 Jan Normal Normal Normal-fair
26 Jan Normal Normal Normal-fair
COMMENT: Global HF radio propagation conditions on UT day 23-Jan
were mostly normal, though some depressions were observed in
the northern hemisphere in the first half of the UT day. HF radio
propagation conditions are expected to be normal to fair on 24-Jan,
then mostly normal over 25-26 Jan. Shortwave fadeouts are possible.
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
23 Jan 81
Observed Australian Regional MUFs
Cocos Island Region:
Depressed by 25% during local day.
Depressed by 25% during local night.
Niue Island Region:
Enhanced by 35% during local day.
Enhanced by 35% during local night.
Northern Australian Region:
Near predicted monthly values.
Southern Australian Region:
Mostly near predicted monthly values.
Antarctic Region (Casey/Davis/Mawson):
Depressed by 15% 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
24 Jan 75 Near predicted monthly values
25 Jan 75 Near predicted monthly values
26 Jan 75 Near predicted monthly values
COMMENT: Maximum Usable Frequencies (MUFs) in the Australian
region were mostly near predicted monthly values on UT day 23-Jan.
Spread-F was observed at Hobart during local night hours. Ionospheric
scintillation was observed at Niue Island over the interval 23/1410-1428UT.
MUFs in the Australian region are expected to be near predicted
monthly values over 24-26 Jan. Shortwave fadeouts are possible.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 22 Jan
Daily Proton Fluence >1 MeV: 1.7E+07
Daily Proton Fluence >10 MeV: 5.0E+05
Daily Electron Fluence >2 MeV: 2.20E+08 (moderate fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability:16%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: C1.4
DSCOVR Satellite Solar Wind Day Averaged Data for 22 Jan
Speed: 536 km/sec Density: 1.2 p/cc Temp: 106000 K Bz: 0 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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