[Ips-dhfpr] ASWFC Daily HF Prop Report - 04 August 25 issued 2332 UT on 04 Aug 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/04 AUGUST 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (04 AUGUST) 
Date   T index  Conditions    
04 Aug   100    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M2.0    0457UT  possible   lower  E. Asia/Aust.

MUFs:
   Cocos Island Region:
      Enhanced by 55% during local day.
      Enhanced by 20% during local night.
   Niue Island Region:
      Mostly near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      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
Jul      88
Aug      96
Sep      93


2. FORECAST (05 AUGUST - 07 AUGUST)
Date   T index  Conditions       MUFs                              
05 Aug    95    Normal           Near predicted monthly values
06 Aug    95    Normal           Near predicted monthly values    
07 Aug    95    Normal-fair      Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 72 was issued on 
3 August and is current for 4-6 Aug. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 04-Aug were near predicted 
monthly values. Spread F was observed at Hobart during local 
night hours. MUFs are expected to be near predicted monthly values 
over 05-07 Aug. Shortwave fadeouts are probable.

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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