[Ips-dhfpr] ASWFC Daily HF Prop Report - 24 July 25 issued 2332 UT on 24 Jul 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/24 JULY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (24 JULY) 
Date   T index  Conditions    
24 Jul   100    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 15% during local day.
      Depressed by 35% during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Enhanced by 20% during local day.
      Depressed by 20% during local night.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 15% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Jun      79
Jul      104
Aug      102


2. FORECAST (25 JULY - 27 JULY)
Date   T index  Conditions       MUFs                              
25 Jul    90    Normal           Near predicted monthly values
26 Jul    90    Normal           Near predicted monthly values    
27 Jul    90    Normal           Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 24-Jul were mostly near predicted monthly values 
in the southern Australian region. In the northern Australian 
region, MUFs were depressed by up to 20% during local night and 
enhanced by up to 20% during local day. Spread F was observed 
during local night hours at Hobart. Sporadic E was observed at 
Hobart and Townsville during local night hours. MUFs are expected 
to be near predicted monthly values over 25-27 Jul.

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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