[Ips-dsgr] ASWFC Daily Report - 27 January 26 issued 2330 UT on 27 Jan 2026 [SEC=OFFICIAL]
Australian Space Weather Forecasting Centre
aswfc at bom.gov.au
Wed Jan 28 10:30:50 AEDT 2026
SUBJ: ASWFC DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/27 JANUARY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
SUMMARY FOR 27 JANUARY AND FORECAST FOR 28 JANUARY - 30 JANUARY
STATUS INDICATORS SOL:** YELLOW ** MAG:** YELLOW ** ION: GREEN
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx
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1A. SOLAR SUMMARY
Activity 27 Jan: R0
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 27 Jan: 144/98
1B. SOLAR FORECAST
28 Jan 29 Jan 30 Jan
Activity R0 Chance R1 R0 Chance R1 R0 Chance R1
Fadeouts None expected Possible Possible
10.7cm/SSN 145/99 140/94 130/84
COMMENT: Solar flare activity was at the R0 level on UT day 27-Jan. Active
Region (AR) 4355 (S12E09, beta)
is currently the largest observed region on the solar disk. This region is one
of six numbered
regions on the solar disk and three unnumbered. 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 28-30 Jan. Solar radiation
storm conditions were at the S0 level on UT day 27-Jan. S0 conditions
are expected for 28-30 Jan. No Earth directed coronal mass ejections
were observed over the past 24 hours. The solar wind speed ranged
between 489-382 km/s across the UT day and is currently 465 km/s.
The interplanetary magnetic field strength (IMF, Bt) peaked at
9 nT during 27-Jan, with the North-South component (Bz) ranging
between -5 and +5 nT over the last UT day. The solar wind speed
is expected to show a small enhancement over 28-30 Jan, due to
coronal hole high speed wind stream effects.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 27 Jan: G0
Estimated Indices 27 Jan : A K
Australian Region 7 22121232
Cocos Island 6 22110232
Darwin 7 22121232
Townsville 7 22122232
Learmonth 7 22021332
Alice Springs 6 12121232
Gingin 9 22121333
Canberra 6 12121232
Kennaook Cape Grim 8 22131232
Hobart 8 22131232
Estimated Antarctic Regional K Indices 27 Jan :
Macquarie Island 11 11343321
Casey 15 34333233
Mawson 15 24223343
Observed Regional daily pc3 Indices 27 Jan :
Darwin 0 (Quiet)
Townsville 0 (Quiet)
Learmonth 0 (Quiet)
Alice Springs 0 (Quiet)
Gingin 13 (Quiet)
Canberra 13 (Quiet)
Hobart 12 (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 27 Jan : A
Fredericksburg 8
Planetary 8
Observed AFr/Ap Indices 26 Jan : A K
Fredericksburg 6
Planetary 10 1123 3322
2B. MAGNETIC FORECAST
Date Ap Conditions
28 Jan 21 G0 chance G1
29 Jan 12 G0 chance G1
30 Jan 8 G0
COMMENT: G0 geomagnetic conditions were observed in Australia
and Antarctic regions. G0 with chance of G1 geomagnetic conditions
are expected over 28-29 Jan due to high speed wind stream effects
from a geoeffective coronal hole . G0 geomagnetic conditions
are expected for 30-Jan.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
27 Jan Normal Normal Normal
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
28 Jan Normal Normal Normal-fair
29 Jan Normal Normal Normal-fair
30 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 28-30
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
27 Jan 128
Observed Australian Regional MUFs
Cocos Island Region:
Near predicted monthly values during local day.
Enhanced by 15% during local night.
Niue Island Region:
Enhanced by 20% during local day.
Enhanced by 45% 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 during local day.
Enhanced by 15% during local night.
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
28 Jan 120 Near to 15% above predicted monthly values
29 Jan 125 Near to 15% above predicted monthly values
30 Jan 115 Near predicted monthly values
COMMENT: Maximum Usable Frequencies (MUFs) in the Australian
and Antarctic regions were near predicted monthly values to 15%
enhanced. MUFs are expected to be near predicted monthly values
to 15% enhanced over 28-29 Jan, with geomagnetic activity from
a small coronal hole high speed wind stream effects. Mostly near
predicted monthly value are expected for 30-Jan.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 26 Jan
Daily Proton Fluence >1 MeV: 2.7E+06
Daily Proton Fluence >10 MeV: 4.5E+04
Daily Electron Fluence >2 MeV: 3.30E+08 (moderate fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability:19%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: C1.0
DSCOVR Satellite Solar Wind Day Averaged Data for 26 Jan
Speed: 490 km/sec Density: 1.7 p/cc Temp: 125000 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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