[Ips-dhfpr] ASWFC Daily HF Prop Report - 30 April 25 issued 2330 UT on 30 Apr 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/30 APRIL 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (30 APRIL) 
Date   T index  Conditions    
30 Apr   119    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M2.0    0751UT  possible   lower  Mid East/Indian

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 60% during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   Northern Australian Region:
      Mostly 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
Mar      126
Apr      115
May      113


2. FORECAST (01 MAY - 03 MAY)
Date   T index  Conditions       MUFs                              
01 May   115    Normal-fair      Near predicted monthly values
02 May   115    Normal-fair      Near predicted monthly values    
03 May   115    Normal-fair      Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 42 was issued on 
29 April and is current for 29 Apr to 1 May. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 30-Apr were near predicted 
monthly values. Spread F was observed at Hobart during local 
night hours. MUFs are expected to be near predicted monthly values 
over 01-03 May. Southern Australian region HF conditions may 
become mildly degraded during local night hours over the forecast 
period. 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