[Ips-dhfpr] ASWFC Daily HF Prop Report - 26 November 25 issued 2330 UT on 26 Nov 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/26 NOVEMBER 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (26 NOVEMBER) 
Date   T index  Conditions    
26 Nov    73    Fair           

Flares: none.

MUFs:
   Cocos Island Region:
      Mostly near predicted monthly values.
      Enhanced by 20% after local dawn.
   Niue Island Region:
      Enhanced by 20% during local day.
      Enhanced by 20% during local night.
   Northern Australian Region:
      Depressed by 15% during local day.
      Near predicted monthly values during local night.
      Depressed by 30% after local dawn.
   Southern Australian Region:
      Depressed by 15% during local day.
      Near predicted monthly values during local night.
      Depressed by 20% 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
Oct      104
Nov      89
Dec      90


2. FORECAST (27 NOVEMBER - 29 NOVEMBER)
Date   T index  Conditions       MUFs                              
27 Nov    80    Fair-normal      Near predicted monthly values
28 Nov    85    Normal           Near predicted monthly values    
29 Nov    90    Normal           Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) were near predicted 
monthly values in the Australian region for UT day 26-Nov, with 
depressions of up to 30% seen after local dawn and some enhancements 
in northern regions of up to 20%. Low frequency sporadic-E was 
observed in the southern Australian region, and spread F was 
also observed in Hobart. MUFs were 15% depressed over the last 
24 hours in the Antarctic region. MUFs may continue to be depressed 
by 15% throughout 27-Nov due to the ongoing geomagnetic activity. 
However, these should recover to near predicted monthly values 
during 28-29 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