[Ips-dhfpr] ASWFC Daily HF Prop Report - 02 September 25 issued 2330 UT on 02 Sep 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/02 SEPTEMBER 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (02 SEPTEMBER) 
Date   T index  Conditions    
02 Sep   130    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      No data available.
   Niue Island Region:
      Mostly near predicted monthly values.
   Northern Australian Region:
      Mostly near predicted monthly values.
      Enhanced by 20% after local dawn.
   Southern Australian Region:
      Enhanced by 20% during local day.
      Enhanced by 25% during local night.
      Depressed by 40% 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
Aug      96
Sep      92
Oct      90


2. FORECAST (03 SEPTEMBER - 05 SEPTEMBER)
Date   T index  Conditions       MUFs                              
03 Sep   105    Normal-fair      Near predicted monthly values
04 Sep   110    Normal           Near to 15% above predicted 
                                 monthly values    
05 Sep   105    Normal-fair      Near predicted monthly values   

COMMENT: ASWFC Preliminary HF Communications Warning 79 was issued 
on 31 August and is current for 2-3 Sep. Maximum usable frequencies 
(MUFs) in the northern Australian region on UT day 02-Sep were 
near predicted monthly values. MUFs in the southern Australian 
region were enhanced by 20-25% and became 40% depressed after 
local dawn. Spread F was observed at Hobart, Canberra and Perth 
during local night hours. MUFs are expected to be near predicted 
monthly values over 03-05 Sep with 15% enhancements on 04-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