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

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/25 AUGUST 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (25 AUGUST) 
Date   T index  Conditions    
25 Aug    90    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M4.5    0524UT  possible   lower  E. Asia/Aust.
  M1.0    0907UT  possible   lower  Mid East/Indian
  M1.2    1518UT  possible   lower  South American/
                                    Atlantic
  M1.1    1538UT  possible   lower  South American/
                                    Atlantic
  

MUFs:
   Cocos Island Region:
      No data available.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Mostly 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 (26 AUGUST - 28 AUGUST)
Date   T index  Conditions       MUFs                              
26 Aug   100    Normal-fair      Near predicted monthly values
27 Aug   100    Normal-fair      Near predicted monthly values    
28 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 25-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 26-28 Aug. 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