[Ips-dhfpr] ASWFC Daily HF Prop Report - 10 October 26 issued 2332 UT on 10 Oct 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/10 OCTOBER 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (10 OCTOBER) 
Date   T index  Conditions    
10 Oct    37    Fair-poor      

Flares    Max     Fadeout    Freq.  Sectors
  M1.2    1413UT  possible   lower  South American/
                                    Atlantic
  M6.4    1510UT  probable   lower  South American/
                                    Atlantic

MUFs:
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Depressed by 20% during local day.
      Near predicted monthly values during local night.
      Depressed by 25% after local dawn.
   Northern Australian Region:
      Mostly near predicted monthly values.
      Depressed by 50% after local dawn.
   Southern Australian Region:
      Depressed by 15% during local day.
      Near predicted monthly values during local night.
      Depressed by 40% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Sep      61
Oct      60
Nov      58


2. FORECAST (11 OCTOBER - 13 OCTOBER)
Date   T index  Conditions       MUFs                              
11 Oct    20    Fair-poor        15 to 40% below predicted monthly 
                                 values
12 Oct    35    Normal-fair      Depressed 15%/near predicted 
                                 monthly values    
13 Oct    35    Normal-fair      Depressed 15%/near predicted 
                                 monthly values   

COMMENT: ASWFC HF Communications Warning 85 was issued on 10 
October and is current for 10-11 Oct. ASWFC SWF HF Communications 
Warning 86 was issued on 10 October and is current for 10-12 
Oct. Maximum Usable Frequencies (MUFs) in the Australian region 
were near predicted monthly values to 15-50% depressed on UT 
day 10-Oct. Depressions began following the onset of geomagnetic 
activity, with MUFs now 40-50% depressed after local dawn. Strong 
spread F was observed at Hobart during local night hours. MUFs 
are expected to remain depressed by 15-40% on 11-Oct, and 15% 
depressed over 12-13 Oct due to forecast geomagnetic activity. 
Shortwave fadeouts are probable.

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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