[Ips-dhfpr] ASWFC Daily HF Prop Report - 04 May 25 issued 2331 UT on 04 May 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/04 MAY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (04 MAY) 
Date   T index  Conditions    
04 May   112    Fair           

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Mostly near predicted monthly values.
      Depressed by 30% after local dawn.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values.
   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 (05 MAY - 07 MAY)
Date   T index  Conditions       MUFs                              
05 May   100    Normal           Near predicted monthly values
06 May   115    Normal-fair      Near predicted monthly values    
07 May   120    Normal           Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 04-May were near predicted monthly values. Significant 
spread F was observed at Hobart during local night hours and 
minor spread F was observed at Canberra. MUFs are expected to 
be near predicted monthly values over 05-07 May. Further spread 
F is expected at Hobart. There is a chance of mild depressions 
in the southern Australian region on 05-06 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