[Ips-dhfpr] ASWFC Daily HF Prop Report - 10 July 25 issued 2332 UT on 10 Jul 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/10 JULY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (10 JULY) 
Date   T index  Conditions    
10 Jul    68    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 15% during local day.
      Depressed by 25% during local night.
      Depressed by 30% after local dawn.
   Niue Island Region:
      Depressed by 20% during local day.
      Depressed by 30% during local night.
      Depressed by 25% after local dawn.
   Northern Australian Region:
      Depressed by 15% during local day.
      Depressed by 35% during local night.
      Depressed by 25% after local dawn.
   Southern Australian Region:
      Depressed by 15% during local day.
      Depressed by 20% during local night.
   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 (11 JULY - 13 JULY)
Date   T index  Conditions       MUFs                              
11 Jul    75    Normal           Near predicted values to 20-30% 
                                 depressed
12 Jul    70    Normal-fair      Near predicted values to 20-30% 
                                 depressed    
13 Jul    60    Normal-fair      Near predicted monthly values 
                                 to 25-35% depressed   

COMMENT: ASWFC SWF HF Communications Warning 70 was issued on 
9 July and is current for 9-11 Jul. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 10-Jul were depressed 
up to 35%. Conditions were degraded in Townsville and Hobart 
during local dawn hours. MUFs are expected to be near predicted 
values to 20-30% depressed over 11-13 Jul, and conditions are 
expected to worsen throughout the period due to coronal hole 
activity.

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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