[Ips-dhfpr] ASWFC Daily HF Prop Report - 22 September 25 issued 2339 UT on 22 Sep 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/22 SEPTEMBER 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (22 SEPTEMBER) 
Date   T index  Conditions    
22 Sep   128    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      No data available.
   Niue Island Region:
      Mostly near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 30% during local night.
   Southern Australian Region:
      Enhanced by 20% during local day.
      Enhanced by 30% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Enhanced by 15% over the UT day.

PCA Event : No event.

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


2. FORECAST (23 SEPTEMBER - 25 SEPTEMBER)
Date   T index  Conditions       MUFs                              
23 Sep   120    Normal           Near to 15% above predicted 
                                 monthly values
24 Sep   110    Normal           Near to 15% above predicted 
                                 monthly values    
25 Sep   110    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 22-Sep were near predicted values to 30% enhanced. 
MUFs are expected to be near predicted values to enhanced by 
15% over 23-25 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