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

[Australian Space Weather Forecasting Centre]

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

1. SUMMARY (04 APRIL) 
Date   T index  Conditions    
04 Apr   138    Fair-normal    

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      Mostly near predicted monthly values.
      Enhanced by 25% after local dawn.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 15% during local night.
      Enhanced by 30% after local dawn.
   Southern Australian Region:
      Mostly near predicted monthly values.
      Enhanced by 20% after local dawn.
      Hobart MUFs 30% depressed after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 45% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Mar      126
Apr      115
May      113


2. FORECAST (05 APRIL - 07 APRIL)
Date   T index  Conditions       MUFs                              
05 Apr   125    Normal           Near predicted monthly values
06 Apr   125    Normal           Near predicted monthly values    
07 Apr   125    Normal           Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 04-Apr were near predicted values to 30% enhanced. 
Spread F was observed at Hobart during local night hours. MUFs 
are generally expected to be near predicted values over 05-07 
Apr. Northern Australian region MUFs are expected to be near 
predicted monthly values to 15% enhanced. Mild depressions of 
15% may be experienced at times for the southern Australian region 
over 05-06 Apr. Hobart MUFs are currently 30% depressed.

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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