[Ips-dsgr] ASWFC Daily Report - 22 February 26 issued 2330 UT on 22 Feb 2026 [SEC=OFFICIAL]
Australian Space Weather Forecasting Centre
aswfc at bom.gov.au
Mon Feb 23 10:30:50 AEDT 2026
SUBJ: ASWFC DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/22 FEBRUARY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
SUMMARY FOR 22 FEBRUARY AND FORECAST FOR 23 FEBRUARY - 25 FEBRUARY
STATUS INDICATORS SOL:GREEN MAG:** YELLOW ** ION: ** YELLOW **
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx
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1A. SOLAR SUMMARY
Activity 22 Feb: R0
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 22 Feb: 110/60
1B. SOLAR FORECAST
23 Feb 24 Feb 25 Feb
Activity R0 R0 R0
Fadeouts None expected None expected None expected
10.7cm/SSN 112/63 115/66 118/70
COMMENT: Solar flare activity was at the R0 level during UT day
22-Feb, with no significant flares observed. The Sun is currently
spotless, with no numbered or unnumbered active regions on the
visible disk. Solar flare activity is expected to remain at the
R0 level through 23-25 Feb, due to the lack of active regions
on the visible disk. S0 solar radiation storm conditions were
observed over the last 24 hours, with the solar proton flux remaining
at background levels. S0 conditions are forecast over 23-25 Feb.
No geoeffective Coronal Mass Ejections (CMEs) were observed over
the past UT day. A far-side CME was visible in the GOES Compact
Coronagraph (CCOR-1) from 22/1300UT. A filament eruption was
also observed on the eastern limb at (S20E88), visible in SDO
and GOES SUVI imaging from 22/1330UT. An associated CME from
this eruption was observed from 22/1600UT, but has been modelled
as missing the Earth. The solar wind increased to very strong
levels over the last 24 hours due to an equatorial coronal hole
high-speed wind stream. The windspeed began the day ranging from
500-550 km/s, and increased after 22/0800UT, and is currently ranging
between 650-700 km/s. The interplanetary magnetic field strength
(IMF, Bt) peaked at 15 nT, at the start of the UT day. The north-south
component (Bz) of the magnetic field ranged between -10 and +11
nT, with a prolonged period of southward Bz observed between
22/0742UT and 22/0952UT. The solar wind is forecast to remain
elevated over 23-24 Feb due to the coronal hole high-speed wind
stream, before declining by 25-Feb as the coronal hole moves
beyond a geoeffective position.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 22 Feb: G1
Estimated Indices 22 Feb : A K
Australian Region 23 34453433
Cocos Island 16 33333433
Darwin 21 34343434
Townsville 23 34453433
Learmonth 25 44443533
Alice Springs 25 34453523
Gingin 25 44343543
Canberra 26 34553433
Kennaook Cape Grim 34 34564533
Hobart 33 34564434
Estimated Antarctic Regional K Indices 22 Feb :
Macquarie Island 68 34776653
Casey 31 46544333
Mawson 109 46665688
Observed Regional daily pc3 Indices 22 Feb :
Darwin 6 (Quiet)
Townsville 2 (Quiet)
Learmonth 5 (Quiet)
Alice Springs 4 (Quiet)
Gingin 50 (Unsettled)
Canberra 92 (Minor storm)
Hobart 119 (Major storm)
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 22 Feb : A
Fredericksburg 28
Planetary 40
Observed AFr/Ap Indices 21 Feb : A K
Fredericksburg 12
Planetary 16 4332 1234
2B. MAGNETIC FORECAST
Date Ap Conditions
23 Feb 21 G0-G1
24 Feb 20 G0, chance of G1
25 Feb 14 G0
COMMENT: ASWFC Geomagnetic Warning 12 was issued on 22 February
and is current for 22-24 Feb. Geomagnetic conditions reached
the G1 level in the Australian region on 22-Feb due to coronal
hole high-speed wind stream effects. Periods of G2 were also
observed in Hobart and Cape Grim. Periods of G3 were observed
in the Antarctic region, with intervals of G4 reported at Mawson.
G1 geomagnetic conditions were also reported at the planetary
level over the past UT day. G0-G1 conditions are expected on
23-Feb due to the ongoing high-speed wind stream effects. These
will decline to G0, with a chance of G1 on 24-Feb, and G0 conditions
on 25-Feb as the Earth moves out of the high-speed wind stream.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
22 Feb Fair Fair Fair-poor
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
23 Feb Fair Fair Fair-poor
24 Feb Normal-fair Normal-fair Fair
25 Feb Normal Normal-fair Normal-fair
COMMENT: Global ionospheric conditions began UT day 22-Feb mostly
normal, but became fair towards the end of the UT day due to
current geomagnetic conditions. Conditions became fair-poor in
high latitude regions, with depressions also seen in the American,
African, and Australian regions late in the UT day. MUFs in the
European region were depressed by 15-20% across the UT day. Ionospheric
conditions are expected to remain fair, with fair-poor conditions
likely in polar regions on 23-Feb. These conditions will gradually
improve over 24-25 Feb, as ongoing geomagnetic activity subsides.
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
22 Feb 89
Observed Australian Regional MUFs
Cocos Island Region:
Enhanced by 30% during local day.
Near predicted monthly values during local night.
Enhanced by 20% after local dawn.
Niue Island Region:
Near predicted monthly values.
Northern Australian Region:
Mostly near predicted monthly values.
Depressed by 30% after local dawn.
Southern Australian Region:
Mostly near predicted monthly values.
Depressed by 25% after local dawn.
Antarctic Region (Casey/Davis/Mawson):
Depressed by 15% over the UT day.
Monthly T index:
Month T index
Jan 96
Feb 88
Mar 87
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
23 Feb 60 Depressed 15 to 25%/near predicted monthly values
24 Feb 70 Depressed 10 to 15%/near predicted monthly values
25 Feb 85 Near predicted monthly values
COMMENT: Maximum Usable Frequencies (MUFs) in the Australian
region became depressed towards the end of the UT day 22-Feb
due to current geomagnetic activity. MUFs in the Australian region
decreased from near monthly predicted values to 25–30% below
predicted values during local dawn hours. Strong sporadic E was
observed during local night hours, and spread F was also observed
at Hobart. MUFs in the Antarctic region were also depressed by
15%. Depressions of 15-25% are expected over 23-24 Feb due to
ongoing geomagnetic activity, before recovering to near monthly
predicted values by 25-Feb.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 21 Feb
Daily Proton Fluence >1 MeV: 2.2E+06
Daily Proton Fluence >10 MeV: 1.4E+04
Daily Electron Fluence >2 MeV: 2.60E+07 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 4%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: B3.1
DSCOVR Satellite Solar Wind Day Averaged Data for 21 Feb
Speed: 501 km/sec Density: 4.8 p/cc Temp: 49000 K Bz: 7 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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