[Ips-dhfpr] ASWFC Daily HF Prop Report - 08 May 25 issued 2330 UT on 08 May 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/08 MAY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (08 MAY) 
Date   T index  Conditions    
08 May    89    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Near predicted monthly values during local day.
      Depressed by 15% during local night.
      Depressed by 20% after local dawn.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 30% during local night.
   Southern Australian Region:
      Near predicted monthly values 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
Apr      123
May      113
Jun      111


2. FORECAST (09 MAY - 11 MAY)
Date   T index  Conditions       MUFs                              
09 May    85    Normal-fair      Depressed 20%/near predicted 
                                 monthly values
10 May    90    Normal           Depressed 20%/near predicted 
                                 monthly values    
11 May    95    Normal           Near predicted monthly values   

COMMENT: ASWFC HF Communications Warning 45 was issued on 7 May 
and is current for 8-10 May. Maximum usable frequencies (MUFs) 
in the Australian region on UT day 08-May were near predicted 
monthly values to 25-30% depressed during local night. Spread 
F was observed at Hobart during local night hours. MUFs are expected 
to be mostly near predicted monthly values to depressed by 20% 
over 09-10 May, conditions are expected to improve towards predicted 
monthly values on 11-May. Minor 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