[Ips-dhfpr] ASWFC Daily HF Prop Report - 03 September 25 issued 2330 UT on 03 Sep 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/03 SEPTEMBER 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (03 SEPTEMBER) 
Date   T index  Conditions    
03 Sep    97    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Enhanced by 15% during local day.
      Enhanced by 30% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Depressed by 25% during local day.
      Near predicted monthly values during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 15% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Aug      96
Sep      92
Oct      90


2. FORECAST (04 SEPTEMBER - 06 SEPTEMBER)
Date   T index  Conditions       MUFs                              
04 Sep   110    Normal           Near to 15% above predicted 
                                 monthly values
05 Sep   105    Normal           Near predicted monthly values    
06 Sep   107    Normal-fair      Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 82 was issued on 
3 September and is current for 3-5 Sep. Maximum usable frequencies 
(MUFs) in the northern Australian region on UT day 03-Sep were 
near predicted monthly values. MUFs in the southern Australian 
region were depressed by 25% during local day and near predicted 
values during local night. Spread F was observed in Hobart and 
Canberra during local night. MUFs are expected to be near to 
15% enhanced over 04 Sep UT and predicted monthly values over 
05-06 Sep. Shortwave fadeouts are possible.

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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