[Ips-dhfpr] ASWFC Daily HF Prop Report - 25 July 25 issued 2332 UT on 25 Jul 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/25 JULY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (25 JULY) 
Date   T index  Conditions    
25 Jul   105    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 30% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Depressed by 15% during local night.
   Northern Australian Region:
      Mostly near predicted monthly values.
      Depressed by 20% after local dawn.
   Southern Australian Region:
      Mostly 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
Jun      79
Jul      104
Aug      102


2. FORECAST (26 JULY - 28 JULY)
Date   T index  Conditions       MUFs                              
26 Jul    95    Normal           Near predicted monthly values 
                                 to 15% depressed
27 Jul    95    Normal           Near predicted monthly values 
                                 to 15% depressed    
28 Jul    95    Normal           Near predicted monthly values 
                                 to 15% depressed   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 25-Jul were near predicted values to 20% depressed. 
Conditions in Hobart during local night hours were degraded. 
Scintillation was observed at Weipa from 1444 to 1459 UT. MUFs 
are expected to be near predicted values over 26-28 Jul, with 
some brief depressions during local night hours.

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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