[Ips-dhfpr] ASWFC Daily HF Prop Report - 27 August 25 issued 2330 UT on 27 Aug 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/27 AUGUST 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (27 AUGUST) 
Date   T index  Conditions    
27 Aug   102    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Mostly 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 : 10MeV Proton/PCA Event Began at 2040UT 26/08, Ended at 2310UT 26/08
 and, 10MeV Proton/PCA Event Began at 0100UT 27/08, Ended at 1305UT 27/08

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


2. FORECAST (28 AUGUST - 30 AUGUST)
Date   T index  Conditions       MUFs                              
28 Aug   110    Normal           Near predicted monthly values
29 Aug   110    Normal           Near predicted monthly values    
30 Aug   110    Normal           Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 77 was issued on 
27 August and is current for 27-29 Aug. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 27-Aug were near predicted 
monthly values. MUFs are expected to be near predicted monthly 
values over 28-30 Aug. Brief shortwave fadeouts are probable.

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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