[Ips-dhfpr] ASWFC Daily HF Prop Report - 05 June 25 issued 2330 UT on 05 Jun 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

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

1. SUMMARY (05 JUNE) 
Date   T index  Conditions    
05 Jun    62    Fair-poor      

Flares    Max     Fadeout    Freq.  Sectors
  M1.1 04/2328UT  possible   lower  West Pacific

MUFs:
   Cocos Island Region:
      Depressed by 15% during local day.
      Depressed by 25% during local night.
   Niue Island Region:
      Depressed by 20% during local day.
      Depressed by 40% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 30% during local night.
   Southern Australian Region:
      Depressed by 20% during local day.
      Depressed by 25% during local night.
      Depressed by 20% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 20% over the UT day.

PCA Event : No event.

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


2. FORECAST (06 JUNE - 08 JUNE)
Date   T index  Conditions       MUFs                              
06 Jun    75    Normal           15 to 20% below predicted monthly 
                                 values
07 Jun    85    Normal           Depressed 15%/near predicted 
                                 monthly values    
08 Jun    85    Normal           Depressed 15%/near predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 58 was issued on 
4 June and is current for 4-6 Jun. Maximum usable frequencies 
(MUFs) in the southern Australian region on UT day 05-Jun were 
depressed by up to 25% throughout the day. MUFs in the northern 
Australian region were near predicted monthly values to depressed 
by 30% during local night. Spread F was observed at Hobart and 
Canberra during local night hours. MUFs are expected to be mostly 
depressed by up to 20% on 06-Jun. Conditions are expected to 
recover towards monthly predicted values over 07-08 Jun. Shortwave 
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