[Ips-wsgr] ASWFC Weekly Solar and Geophysical Report (23 January 26) issued 0214 UT on 23 Jan 2026 [SEC=OFFICIAL]

Fri Jan 23 13:14:04 AEDT 2026

SUBJ: ASWFC WEEKLY SOLAR AND GEOPHYSICAL REPORT 
ISSUED ON 23 JANUARY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (16 JANUARY - 22 JANUARY)
Date     16    17    18    19    20    21    22
10cm    148   159   148   173   178   188   194
AFr      17    18    12    64    91    45  ( 12)
Aaus     15    15    10    84   115    34  ( 11)
T        83    87    96    95   -16    81    85

Solar:        Solar flare activity
Geomagnetic:  Geomagnetic activity observed for Australian region.
Frequencies:  Australian ionospheric F2 critical frequencies

16 Jan 
Solar:        R0
Geomagnetic:  G0
Frequencies:  
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Niue Island Region:
      Mostly near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 20% over the UT day.

17 Jan 
Solar:        R1, with an M2.1 at 1029UT, and an M1.1 at 
              2351UT
Geomagnetic:  G0
In the BOM magnetometer data for 17 Jan, a weak (14nT) impulse 
was observed at 0610UT.
Frequencies:  
   Cocos Island Region:
      Near predicted monthly values.
   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.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 20% over the UT day.

18 Jan 
Solar:        R3, with an M1.1 at 2351UT, and an X1.9 at 1809UT
Geomagnetic:  G0
Frequencies:  
   Cocos Island Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      Enhanced by 25% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
      Depressed 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.

19 Jan 
Solar:        R1, with an M1.2 at 1119UT
Geomagnetic:  G4
In the BOM magnetometer data for 19 Jan, a weak (12nT) impulse 
was observed at 1914UT.
Frequencies:  
   Cocos Island Region:
      Depressed by 30% during local day.
      Depressed by 15% during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Mostly near predicted monthly values.
      Depressed by 25% after local dawn.
   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.
      Proton event in progress, increased absorption observed.

20 Jan 
Solar:        R0
Geomagnetic:  G4
Frequencies:  
   Cocos Island Region:
      Depressed by 40% during local day.
      Depressed by 55% during local night.
      Depressed by 50% after local dawn.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Depressed by 60% during local day.
      Depressed by 55% during local night.
   Southern Australian Region:
      Depressed by 40% during local day.
      Depressed by 55% during local night.
      Depressed by 30% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.
      Proton event in progress, increased absorption observed.

21 Jan 
Solar:        R1, with an M1.1 at 0135UT, and an M3.4 at 
              0712UT
Geomagnetic:  G2
Frequencies:  
   Cocos Island Region:
      Mostly near predicted monthly values.
      Depressed by 40% after local dawn.
   Niue Island Region:
      Enhanced by 15% during local day.
      Enhanced by 35% during local night.
   Northern Australian Region:
      Mostly near predicted monthly values.
      Depressed by 25% after local dawn.
   Southern Australian Region:
      Depressed by 25% during local day.
      Near predicted monthly values during local night.
      Depressed by 25% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

22 Jan 
Solar:        R0
Geomagnetic:  G0
Frequencies:  
   Cocos Island Region:
      Depressed by 35% during local day.
      Depressed by 25% during local night.
      Depressed by 20% after local dawn.
   Niue Island Region:
      Enhanced by 35% during local day.
      Enhanced by 55% during local night.
      Enhanced by 30% after local dawn.
   Northern Australian Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
   Southern Australian Region:
      Depressed by 20% during local day.
      Near predicted monthly values during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

2. FORECAST (23 JANUARY - 29 JANUARY)
Solar: 
R1-R2 solar flare activity is forecast throughout the week,
due to previous flare activity and magnetic complexity in 
solar Active Regions 4341, 4342, 4345, and 4350.

Geomagnetic:  
G0 with a chance of G1 on 23-Jan due to ongoing geomagnetic
storm effects combined with a high speed coronal hole wind 
stream. G0 with a chance of G1 on 28-29 Jan sue to a 
possible recurrent coronal hole. G0 on other days.

Frequencies:  
MUFs may be mildly depressed on 23-Jan due to lingering 
effects of a past CME impact, combine with a coronal hole
 high speed wind stream. Possible mild depressions on 
28-29 Jan due to a recurrent coronal bole. MUFs near 
predicted monthly values on other days.

For an explanation of some of the terms in this report, go to
https://www.sws.bom.gov.au, and follow links to Educational->
Glossary on Solar Terrestrial Terms.

Australian Space Weather Forecasting Centre
Bureau of Meteorology
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au