[Ips-dhfpr] ASWFC Daily HF Prop Report - 14 August 25 issued 2330 UT on 14 Aug 2025 [SEC=OFFICIAL]

Fri Aug 15 09:30:52 AEST 2025

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/14 AUGUST 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (14 AUGUST) 
Date   T index  Conditions    
14 Aug    91    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 25% during local day.
      Depressed by 20% during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 15% 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
Jul      88
Aug      96
Sep      93

2. FORECAST (15 AUGUST - 17 AUGUST)
Date   T index  Conditions       MUFs                              
15 Aug    90    Normal           Near predicted monthly values
16 Aug    95    Normal           Near predicted monthly values    
17 Aug    95    Normal           Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 14-Aug were near predicted monthly values with 
depressions of up to 15% observed during local night in the northern 
Australian region. Spread F was observed at Hobart and sporadic 
E was observed at Brisbane mostly during local night hours. MUFs 
are expected to be near predicted monthly values over 15-17 Aug.

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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