[Ips-dhfpr] ASWFC Daily HF Prop Report - 30 October 25 issued 2330 UT on 30 Oct 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/30 OCTOBER 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (30 OCTOBER) 
Date   T index  Conditions    
30 Oct    77    Fair           

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Depressed by 20% during local day.
      Near predicted monthly values during local night.
      Depressed by 35% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 15% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Sep      109
Oct      89
Nov      89


2. FORECAST (31 OCTOBER - 02 NOVEMBER)
Date   T index  Conditions       MUFs                              
31 Oct    65    Normal-fair      Depressed 15%/near predicted 
                                 monthly values
01 Nov    80    Normal-fair      Near predicted monthly values    
02 Nov    80    Normal           Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 30-Oct were 
near predicted monthly values in northern Australia. MUFs were 
depressed by 20-35% in southern Australian regions. Spread F 
was observed at Hobart during local night hours. MUFs are expected 
to be near predicted monthly values to 15% depressed on 31-Oct, 
returning to near predicted monthly values over 01-02 Nov.

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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