[Ips-dhfpr] ASWFC Daily HF Prop Report - 30 August 25 issued 2330 UT on 30 Aug 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/30 AUGUST 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (30 AUGUST) 
Date   T index  Conditions    
30 Aug   114    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.3    1409UT  possible   lower  South American/
                                    Atlantic
  M1.2    1559UT  possible   lower  South American/
                                    Atlantic
  M2.7    2002UT  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 during local day.
      Enhanced by 55% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
      Enhanced by 25% after local dawn.
   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 (31 AUGUST - 02 SEPTEMBER)
Date   T index  Conditions       MUFs                              
31 Aug   115    Normal           Near predicted monthly values 
                                 to 20% enhanced
01 Sep   115    Normal           Near predicted monthly values 
                                 to 20% enhanced    
02 Sep   115    Normal           Near predicted monthly values 
                                 to 20% enhanced   

COMMENT: ASWFC SWF HF Communications Warning 78 was issued on 
30 August and is current for 30-31 Aug. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 30-Aug were near predicted 
values to 25% enhanced. Scintillation was observed in Niue from 
0853 to 0916 UT. MUFs are expected to be near predicted values 
to 20% enhanced over 31-Aug to 2-Sep. 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