[Ips-dhfpr] ASWFC Daily HF Prop Report - 05 September 25 issued 2330 UT on 05 Sep 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/05 SEPTEMBER 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (05 SEPTEMBER) 
Date   T index  Conditions    
05 Sep   114    Fair-normal    

Flares    Max     Fadeout    Freq.  Sectors
  M1.4    0116UT  possible   lower  West Pacific

MUFs:
   Cocos Island Region:
      No data available.
   Niue Island Region:
      Enhanced by 15% during local day.
      Enhanced by 30% during local night.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 25% during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% 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 (06 SEPTEMBER - 08 SEPTEMBER)
Date   T index  Conditions       MUFs                              
06 Sep   100    Fair-normal      Near predicted monthly values
07 Sep   100    Fair-normal      Near predicted monthly values    
08 Sep    80    Fair-normal      15% depressed to near predicted 
                                 monthly values   

COMMENT: Maximum usable frequencies (MUFs) in the northern Australian 
region on UT day 05-Sep were near predicted monthly values to 
30% enhanced. Enhanced MUFs were observed during local night 
hours. Spread F was observed at Hobart during local night hours. 
MUFs are generally expected to be near to predicted monthly values 
over 06-08 Sep with degraded HF conditions during local night 
hours for the southern Australian region. Mild depressions of 
15% may be experienced after local dawn for the southern Australian 
region. MUFs for the southern Australian region may become 15% 
depressed on 08-Sep due to a possible weak CME arrival on 07-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