[Ips-dhfpr] ASWFC Daily HF Prop Report - 08 September 25 issued 2330 UT on 08 Sep 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/08 SEPTEMBER 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (08 SEPTEMBER) 
Date   T index  Conditions    
08 Sep   103    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Depressed by 15% during local night.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 35% during local night.
   Southern Australian Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

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


2. FORECAST (09 SEPTEMBER - 11 SEPTEMBER)
Date   T index  Conditions       MUFs                              
09 Sep   100    Normal           Near predicted monthly values
10 Sep   100    Normal           Near predicted monthly values    
11 Sep    95    Normal           Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) in the northern Australian 
region on UT day 08-Sep were near predicted monthly values. Spread 
F was observed at Perth during local night hours and Hobart during 
dawn hours. Spread F is forecasted at high latitudes during local 
night due to the ongoing coronal hole. MUFs are expected to be 
near predicted monthly values on 09-11 Sep. Isolated minor 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