[Ips-dhfpr] ASWFC Daily HF Prop Report - 08 October 26 issued 2330 UT on 08 Oct 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/08 OCTOBER 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (08 OCTOBER) 
Date   T index  Conditions    
08 Oct    57    Normal-fair    

Flares    Max     Fadeout    Freq.  Sectors
  M6.7    1548UT  probable   lower  South American/
                                    Atlantic

MUFs:
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Southern Australian Region:
      Near predicted monthly values.
   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 (09 OCTOBER - 11 OCTOBER)
Date   T index  Conditions       MUFs                              
09 Oct    40    Fair             Near predicted values to 15% 
                                 depressed
10 Oct    40    Fair-normal      Near predicted values to 15% 
                                 depressed    
11 Oct    40    Fair             Near predicted values to 15% 
                                 depressed   

COMMENT: ASWFC Preliminary HF Communications Warning 83 was issued 
on 7 October and is current for 9-10 Oct. ASWFC SWF HF Communications 
Warning 84 was issued on 8 October and is current for 9-10 Oct. 
Maximum Usable Frequencies (MUFs) in the Australian region were 
mostly near predicted values over 08-Oct, with some overnight 
enhancements observed in the Northern Australian region during 
local night hours. Scintillation was observed in both Darwin 
and Weipa over the period 08/1209-1259UT, with the eightieth 
percentile S4 reaching 0.798. Spread F was also observed in the 
southern Australian region during local night hours. MUFs are 
forecast to become depressed up to 15% over 09-11 Oct due to 
upcoming geomagnetic activity across the entire forecast period. 
Spread F may be present in southern Australian regions during 
local night hours, and 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