[Ips-dsgr] ASWFC Daily Report - 25 January 26 issued 2330 UT on 25 Jan 2026 [SEC=OFFICIAL]
Australian Space Weather Forecasting Centre
aswfc at bom.gov.au
Mon Jan 26 10:30:49 AEDT 2026
SUBJ: ASWFC DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/25 JANUARY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
SUMMARY FOR 25 JANUARY AND FORECAST FOR 26 JANUARY - 28 JANUARY
STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx
-----------------------------------------------------------
1A. SOLAR SUMMARY
Activity 25 Jan: R0
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 25 Jan: 165/119
1B. SOLAR FORECAST
26 Jan 27 Jan 28 Jan
Activity R0, chance R1 R0, chance R1 R0, chance R1
Fadeouts None expected None expected None expected
10.7cm/SSN 160/114 150/105 145/99
COMMENT: Solar flare activity on UT day 25-Jan was at the R0
level with only C-class flares observed, the largest of which
was a C7.9 produced by AR4342 (N18W68, beta). There are currently
nine numbered sunspot regions visible on the solar disk. AR4349
(S14W00, beta) is the largest region on the disk and has shown
decay in its trailer spots. AR4351 (S05W32, beta) has exhibited
mild growth in its trailer spots over the UT day. AR4355 (S12E32,
beta) has shown mild growth in its leader spots. All other sunspot
regions are either stable or in decay. Solar flare activity is
expected to be at the R0 level over 26-28 Jan, with a chance
of R1. S0 solar proton conditions were observed on UT day 25-Jan,
with the proton flux continuing a gradual decline over the UT
day. S0 solar proton conditions are expected over 26-28 Jan,
with a chance of S1. No Earth-directed CMEs have been observed
in the available coronagraph imagery. The solar wind speed on
UT day 25-Jan mildly declined, ranging from 485 to 600 km/s and
is currently near 500 km/s. The peak total interplanetary magnetic
field strength (IMF, Bt) was 7 nT and the north-south IMF component
(Bz) range was -5 to +6 nT. The solar wind speed is expected
to decrease on 26-Jan, then mildly increase late on 27-Jan due
to coronal hole high speed wind stream effects from a small northern
hemisphere coronal hole.
-----------------------------------------------------------
2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 25 Jan: G0
Estimated Indices 25 Jan : A K
Australian Region 9 22223322
Cocos Island 7 22222321
Darwin 11 32223323
Townsville 10 22323322
Learmonth 11 32223422
Alice Springs 9 22223322
Gingin 10 32223322
Canberra 9 22323312
Kennaook Cape Grim 10 23323312
Hobart 10 23323312
Estimated Antarctic Regional K Indices 25 Jan :
Macquarie Island 25 23545512
Casey 28 46534223
Mawson 39 44444473
Observed Regional daily pc3 Indices 25 Jan :
Darwin 0 (Quiet)
Townsville 0 (Quiet)
Learmonth 0 (Quiet)
Alice Springs 0 (Quiet)
Gingin 32 (Quiet to unsettled)
Canberra 49 (Unsettled)
Hobart 67 (Active)
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 25 Jan : A
Fredericksburg 14
Planetary 17
Observed AFr/Ap Indices 24 Jan : A K
Fredericksburg 12
Planetary 17 4223 3343
2B. MAGNETIC FORECAST
Date Ap Conditions
26 Jan 10 G0
27 Jan 8 G0
28 Jan 14 G0, chance of G1
COMMENT: G0 geomagnetic conditions were observed in the planetary
and Australian regions on UT day 25-Jan. Mostly G1 geomagnetic
conditions were observed in the Antarctic region, with an isolated
period of G2 observed at Casey and an isolated period of G3 observed
at Mawson. G0 geomagnetic conditions are expected over 26-28
Jan, with a chance of G1 on 28-Jan due to coronal hole high speed
wind stream effects from a small northern hemisphere coronal
hole.
-----------------------------------------------------------
3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
25 Jan Normal Normal Normal
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
26 Jan Normal Normal Normal-fair
27 Jan Normal Normal Normal-fair
28 Jan Normal Normal Normal-fair
COMMENT: Global HF radio propagation conditions on UT day 25-Jan
were mostly normal, with some depressions observed in European
regions. HF radio propagation conditions are expected to be mostly
normal over 26-28 Jan.
-----------------------------------------------------------
4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
25 Jan 132
Observed Australian Regional MUFs
Cocos Island Region:
Mostly near predicted monthly values.
Enhanced by 25% after local dawn.
Niue Island Region:
Enhanced by 25% during local day.
Enhanced by 105% during local night.
Enhanced by 30% after local dawn.
Northern Australian Region:
Near predicted monthly values during local day.
Enhanced by 25% during local night.
Enhanced by 25% after local dawn.
Southern Australian Region:
Near predicted monthly values.
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
26 Jan 125 Near to 15% above predicted monthly values
27 Jan 125 Near to 15% above predicted monthly values
28 Jan 115 Near to 15% above predicted monthly values
COMMENT: Maximum Usable Frequencies (MUFs) in the Australian
region were near predicted monthly values to 25% enhanced on
UT day 25-Jan. MUFs in the Australian region are expected to
be near predicted monthly values to 15% enhanced over 26-28 Jan.
-----------------------------------------------------------
5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 24 Jan
Daily Proton Fluence >1 MeV: 5.9E+06
Daily Proton Fluence >10 MeV: 1.7E+05
Daily Electron Fluence >2 MeV: 2.00E+08 (moderate fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability:15%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: C1.3
DSCOVR Satellite Solar Wind Day Averaged Data for 24 Jan
Speed: 537 km/sec Density: 1.6 p/cc Temp: 127000 K Bz: -1 nT
(Courtesy Space Weather Prediction Center, Boulder USA)
-----------------------------------------------------------
Australian Space Weather Forecasting Centre
Bureau of Meteorology
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au
More information about the ips-dsgr
mailing list