[Ips-dhfpr] ASWFC Daily HF Prop Report - 24 September 25 issued 2330 UT on 24 Sep 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/24 SEPTEMBER 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (24 SEPTEMBER) 
Date   T index  Conditions    
24 Sep   127    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.0    0931UT  possible   lower  Mid East/Indian
  M1.6    1913UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Enhanced by 20% during local day.
      Enhanced by 100% during local night.
   Niue Island Region:
      Enhanced by 40% during local day.
      Enhanced by 35% during local night.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
      Enhanced by 30% after local dawn.
   Southern Australian Region:
      Mostly near predicted monthly values.
   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 (25 SEPTEMBER - 27 SEPTEMBER)
Date   T index  Conditions       MUFs                              
25 Sep   115    Normal           Near to 15% above predicted 
                                 monthly values
26 Sep   110    Normal           Near to 15% above predicted 
                                 monthly values    
27 Sep   100    Normal           Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 24-Sep were near predicted values to 15% enhanced. 
Spread F was observed at Hobart over local night. MUFs are expected 
to be near predicted values to enhanced by 15% over 25-27 Sep. 
Isolated minor shortwave fadeouts are possible. Equatorial scintillation 
possible over 25-27 Sep.

----------------------------------------------------------
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