[Ips-dhfpr] ASWFC Daily HF Prop Report - 05 July 25 issued 2332 UT on 05 Jul 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/05 JULY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (05 JULY) 
Date   T index  Conditions    
05 Jul    91    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 15% during local day.
      Depressed by 30% during local night.
   Niue Island Region:
      Depressed by 20% during local day.
      Depressed by 30% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 15% during local night.
      Depressed by 25% after local dawn.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 25% over the UT day.

PCA Event : No event.

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


2. FORECAST (06 JULY - 08 JULY)
Date   T index  Conditions       MUFs                              
06 Jul    90    Normal           Depressed 10 to 15%/near predicted 
                                 monthly values
07 Jul    95    Normal           Near predicted monthly values    
08 Jul   100    Normal           Near predicted monthly values   

COMMENT: ASWFC Preliminary HF Communications Warning 68 was issued 
on 4 July and is current for 4-6 Jul. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 5-Jul were near predicted 
values to 25% depressed. Conditions at low and high latitudes 
were degraded during local dawn hours and Cocos Island experienced 
significant depressions. MUFs are expected to be near predicted 
values to 15% depressed on UT day 6-Jul, on an improving trend 
over 7-8 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