[Ips-dhfpr] ASWFC Daily HF Prop Report - 10 August 25 issued 2331 UT on 10 Aug 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/10 AUGUST 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (10 AUGUST) 
Date   T index  Conditions    
10 Aug    95    Fair-normal    

Flares    Max     Fadeout    Freq.  Sectors
  M1.7    0312UT  possible   lower  E. Asia/Aust.
  M2.2    1507UT  possible   lower  South American/
                                    Atlantic
  M1.7    2305UT  possible   lower  West Pacific

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Enhanced by 15% during local day.
      Depressed by 15% during local night.
      Enhanced by 30% after local dawn.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Mostly near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 25% over the UT day.

PCA Event : No event.

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


2. FORECAST (11 AUGUST - 13 AUGUST)
Date   T index  Conditions       MUFs                              
11 Aug    90    Normal-fair      Near predicted monthly values
12 Aug    90    Normal           Near predicted monthly values    
13 Aug    90    Normal           Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 10-Aug were mostly near predicted monthly values. 
The exception was Hobart, where depressions of up to 30% were 
observed during local night. Spread F was also observed at Hobart 
and Canberra during local night hours. MUFs are expected to be 
near predicted monthly values on 11-13 Aug, with a slight chance 
of further depressions in the southern Australian region on 11-Aug. 
Shortwave fadeouts are possible.

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