[Ips-dhfpr] ASWFC Daily HF Prop Report - 06 May 25 issued 2330 UT on 06 May 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/06 MAY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (06 MAY) 
Date   T index  Conditions    
06 May   104    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 30% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Depressed by 35% during local night.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Depressed by 15% during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 25% 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 (07 MAY - 09 MAY)
Date   T index  Conditions       MUFs                              
07 May   105    Normal           Near predicted monthly values
08 May   105    Normal           Near predicted monthly values    
09 May   105    Normal-fair      Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 44 was issued on 
5 May and is current for 5-7 May. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 06-May were near predicted 
monthly values to 15-25% depressed during local night. Spread 
F was observed at Hobart and Canberra during local night hours. 
MUFs are expected to be near predicted monthly values over 07-09 
May. There is a chance of mild depressions in the southern Australian 
region over the forecast period due to expected geomagnetic activity. 
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