[Ips-dhfpr] ASWFC Daily HF Prop Report - 26 August 25 issued 2331 UT on 26 Aug 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/26 AUGUST 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (26 AUGUST) 
Date   T index  Conditions    
26 Aug   101    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M3.3    0030UT  possible   lower  West Pacific
  M4.5    0525UT  possible   lower  E. Asia/Aust.
  M1.0    1407UT  possible   lower  South American/
                                    Atlantic

MUFs:
   Cocos Island Region:
      No data available.
   Niue Island Region:
      Enhanced by 25% during local day.
      Enhanced by 15% during local night.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 25% during local night.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.
      Proton event in progress, increased absorption observed.

PCA Event : 10MeV Proton/PCA Event Began 26 08 2025 2040UT and is in progress

Monthly T index:
Month  T index
Jul      88
Aug      96
Sep      93


2. FORECAST (27 AUGUST - 29 AUGUST)
Date   T index  Conditions       MUFs                              
27 Aug   100    Normal           Near predicted monthly values
28 Aug   100    Normal           Near predicted monthly values    
29 Aug   100    Normal           Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 76 was issued on 
25 August and is current for 25-27 Aug. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 26-Aug were near predicted 
monthly values to 25% enhanced. MUFs are expected to be near 
predicted monthly values over 27-29 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