[Ips-dhfpr] ASWFC Daily HF Prop Report - 25 November 25 issued 2330 UT on 25 Nov 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/25 NOVEMBER 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (25 NOVEMBER) 
Date   T index  Conditions    
25 Nov    83    Fair-poor      

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 15% during local day.
      Enhanced by 15% during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Mostly near predicted monthly values.
      Depressed by 30% after local dawn.
   Southern Australian Region:
      Mostly near predicted monthly values.
      Depressed by 30% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 20% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Oct      104
Nov      89
Dec      90


2. FORECAST (26 NOVEMBER - 28 NOVEMBER)
Date   T index  Conditions       MUFs                              
26 Nov    72    Fair             Depressed 15%/near predicted 
                                 monthly values
27 Nov    78    Fair-normal      Near predicted monthly values    
28 Nov    85    Normal-fair      Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) were mostly near predicted 
monthly values in the Australian region for UT day 25-Nov, with 
depressions of up to 30% seen after local dawn. Low frequency 
sporadic-E was observed in the southern Australian region, and 
spread F was also observed in Hobart. MUFs were 20% depressed 
over the last 24 hours in the Antarctic region. MUFs may continue 
to be depressed by 15% throughout 26-Nov due to the ongoing geomagnetic 
activity. However, these should recover to near predicted monthly 
values during 27-28 Nov. Sporadic-E during local night hours 
may also be observed.

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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