[Ips-wsgr] ASWFC Weekly Solar and Geophysical Report (02 October 26) issued 0242 UT on 02 Oct 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY SOLAR AND GEOPHYSICAL REPORT 
ISSUED ON 02 OCTOBER 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (25 SEPTEMBER - 01 OCTOBER)
Date     25    26    27    28    29    30    01
10cm    105   101    97    95    92    93    92
AFr      16    11     8     3     3     3  (  3)
Aaus     12     8     3     1     1     1  (  2)
T        64    53    55    49    60    62    53

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

25 Sep 
Solar:        R0
Geomagnetic:  GO
Frequencies:  
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Enhanced by 30% during local day.
      Enhanced by 30% during local night.
      Enhanced by 25% after local dawn.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 15% over the UT day.

26 Sep 
Solar:        R0
Geomagnetic:  G0
Frequencies:  
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 15% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 15% over the UT day.

27 Sep 
Solar:        R0
Geomagnetic:  G0
Frequencies:  
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Enhanced by 45% during local day.
      Enhanced by 45% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

28 Sep 
Solar:        R0
Geomagnetic:  G0
Frequencies:  
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   Northern Australian Region:
      Depressed by 15% during local day.
      Near predicted monthly values during local night.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

29 Sep 
Solar:        R0
Geomagnetic:  G0
Frequencies:  
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

30 Sep 
Solar:        R0
Geomagnetic:  G0
Frequencies:  
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Enhanced by 20% over the UT day.

01 Oct 
Solar:        R0
Geomagnetic:  G0
Frequencies:  
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Depressed by 25% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Enhanced by 15% over the UT day.

 
2. FORECAST (02 OCTOBER - 08 OCTOBER)
Solar: 
Solar flare activity is expected to be at the R0 level over
the week.

Geomagnetic:  
G1, chance G2 geomagnetic activity is expected on the 02-Oct. This will give way
to G0, chance G1 conditions on the 03-Oct, before increasing to G1 on the
04-Oct. 
Geomagnetic conditions on the 05-Oct are expected to be G0, chance G1. The
remainder of the week is expected to be at G0 levels. Activity is due to a CME
first observed on the 28-Sep, followed by another on the 30-Sep.
The latter CME will likely coincide with a coronal hole high speed wind stream.
Both CMEs are expected to only glance the Earth.

Frequencies:  
Maximum Usable Frequencies (MUFs) in the Australian region are 
expected to be near predicted monthly values on the 02-Oct. Depressions of up to
15% are anticipated over the 03-05 Oct. Conditions will should then return to
predicted monthly values for the remainder of the week.

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