[Ips-dhfpr] ASWFC Daily HF Prop Report - 09 June 25 issued 2330 UT on 09 Jun 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/09 JUNE 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (09 JUNE) 
Date   T index  Conditions    
09 Jun    89    Normal-fair    

Flares: none.

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

PCA Event : No event.

Monthly T index:
Month  T index
May      94
Jun      109
Jul      107


2. FORECAST (10 JUNE - 12 JUNE)
Date   T index  Conditions       MUFs                              
10 Jun    80    Normal           Depressed 15%/near predicted 
                                 monthly values
11 Jun    90    Normal           Near predicted monthly values    
12 Jun    90    Normal           Near predicted monthly values   

COMMENT: ASWFC HF Communications Warning 60 was issued on 8 June 
and is current for 9-10 Jun. Maximum usable frequencies (MUFs) 
in the Australian region on UT day 09-Jun were near predicted 
values to 25% depressed during local night hours. Depressions 
during daylight hours were also observed in the southern Australian 
region. Spread-F was observed at Hobart and Canberra during local 
night and dawn hours. MUFs in the Australian region over 10-Jun 
are expected to be near predicted monthly values to depressed 
by up to 20%. Conditions are expected to improve towards monthly 
predicted values over 11-12 Jun.

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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