[Ips-dhfpr] ASWFC Daily HF Prop Report - 10 June 25 issued 2330 UT on 10 Jun 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

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

1. SUMMARY (10 JUNE) 
Date   T index  Conditions    
10 Jun    72    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 25% during local night.
   Niue Island Region:
      Depressed by 15% during local day.
      Depressed by 30% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 30% during local night.
   Southern Australian Region:
      Depressed by 15% during local day.
      Depressed by 30% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 20% over the UT day.
      Frequent sporadic E observed at Mawson and Casey.

PCA Event : No event.

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


2. FORECAST (11 JUNE - 13 JUNE)
Date   T index  Conditions       MUFs                              
11 Jun    90    Fair-normal      Depressed 10 to 15%/near predicted 
                                 monthly values
12 Jun    90    Fair-normal      Depressed 10 to 15%/near predicted 
                                 monthly values    
13 Jun    90    Normal           Depressed 10 to 15%/near predicted 
                                 monthly values   

COMMENT: ASWFC HF Communications Warning 61 was issued on 10 
June and is current for 10-12 Jun. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 10-Jun were near predicted 
values to 30% depressed during local night hours. Depressions 
of 15% during daylight hours were observed in the southern Australian 
region. Spread-F was observed at Darwin, Townsville, Hobart and 
Canberra during local night hours. MUFs in the Australian region 
over 11-13 Jun are generally expected to be depressed 10-15% 
to near predicted monthly values. Mildly degraded HF conditions 
are possible during local night hours. Isolated minor fadeouts 
are possible.

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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