[Ips-dhfpr] ASWFC Daily HF Prop Report - 08 August 25 issued 2330 UT on 08 Aug 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/08 AUGUST 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (08 AUGUST) 
Date   T index  Conditions    
08 Aug    82    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M2.8    0353UT  possible   lower  E. Asia/Aust.
  M1.0    1910UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Depressed by 20% during local day.
      Depressed by 30% during local night.
   Niue Island Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   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 (09 AUGUST - 11 AUGUST)
Date   T index  Conditions       MUFs                              
09 Aug    80    Normal-fair      Near predicted monthly values
10 Aug    85    Normal           Near predicted monthly values    
11 Aug    85    Normal           Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 74 was issued on 
8 August and is current for 8-10 Aug. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 08-Aug were near predicted 
monthly values. Spread F was observed at Hobart, Brisbane and 
Townsville during local night hours. MUFs are expected to be 
near predicted monthly values over 09-11 Aug, with a slight chance 
of mild depressions in the southern Australian region over 09-10 
Aug due to expected geomagnetic activity. 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