[Ips-dhfpr] ASWFC Daily HF Prop Report - 25 October 26 issued 2330 UT on 25 Oct 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/25 OCTOBER 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (25 OCTOBER) 
Date   T index  Conditions    
25 Oct    33    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Depressed by 15% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Depressed by 20% during local day.
      Depressed by 15% during local night.
   Southern Australian Region:
      Depressed by 15% during local day.
      Near predicted monthly values during local night.
   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 (26 OCTOBER - 28 OCTOBER)
Date   T index  Conditions       MUFs                              
26 Oct    40    Normal           Near predicted monthly values
27 Oct    50    Normal           Near predicted monthly values    
28 Oct    50    Normal           Near predicted monthly values   

COMMENT: ASWFC HF Communications Warning 94 was issued on 24 
October and is current for 25-Oct. Maximum Usable Frequencies 
(MUFs) on UT day 25-Oct were depressed by 15-20% in northern 
Australia regions. MUFs in southern Australia were near predicted 
monthly values during local night and 15% depressed during local 
day. Spread F was observed at Hobart and Perth during local night 
hours. MUFs are forecast to be mostly near predicted monthly 
values over 26-28 Oct.

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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