[Ips-dhfpr] ASWFC Daily HF Prop Report - 06 September 25 issued 2330 UT on 06 Sep 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/06 SEPTEMBER 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (06 SEPTEMBER) 
Date   T index  Conditions    
06 Sep   121    Fair-normal    

Flares    Max     Fadeout    Freq.  Sectors
  M1.2    2215UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      No data available.
   Niue Island Region:
      Enhanced by 35% during local day.
      Enhanced by 20% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Southern Australian Region:
      Enhanced by 20% 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 (07 SEPTEMBER - 09 SEPTEMBER)
Date   T index  Conditions       MUFs                              
07 Sep    90    Normal-fair      Depressed 10 to 15%/near predicted 
                                 monthly values
08 Sep    80    Normal           Depressed 10 to 15%/near predicted 
                                 monthly values    
09 Sep   100    Normal           Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) in the northern Australian 
region on UT day 06-Sep were near predicted monthly values to 
20% enhanced. Spread F was observed at Canberra and Hobart during 
local night hours. MUFs are generally expected to be 15% depressed 
to near to predicted monthly values over 07-08 Sep with degraded 
HF conditions during local night hours for the southern Australian 
region. MUFs are expected to be near predicted monthly values 
on 09-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