[Ips-dhfpr] ASWFC Daily HF Prop Report - 22 August 25 issued 2330 UT on 22 Aug 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/22 AUGUST 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (22 AUGUST) 
Date   T index  Conditions    
22 Aug    94    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.7    1851UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      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 (23 AUGUST - 25 AUGUST)
Date   T index  Conditions       MUFs                              
23 Aug    98    Normal           Near predicted monthly values
24 Aug    98    Normal           Near predicted monthly values    
25 Aug    98    Normal           Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 23-Aug were near predicted monthly values. Spread 
F was observed at Hobart and Brisbane during local night hours. 
Sporadic E was observed at Brisbane and Learmonth. MUFs are expected 
to be near predicted monthly values over 23-25 Aug.

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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