[Ips-dhfpr] ASWFC Daily HF Prop Report - 05 April 25 issued 2334 UT on 05 Apr 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/05 APRIL 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (05 APRIL) 
Date   T index  Conditions    
05 Apr   129    Fair-normal    

Flares    Max     Fadeout    Freq.  Sectors
  M1.0    2005UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Enhanced by 15% during local day.
      Enhanced by 20% during local night.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 15% during local night.
      Depressed by 30% 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 (06 APRIL - 08 APRIL)
Date   T index  Conditions       MUFs                              
06 Apr    70    Fair-normal      Depressed 15 to 30%/near predicted 
                                 monthly values
07 Apr   125    Normal           Near predicted monthly values    
08 Apr   125    Normal-fair      Near predicted monthly values   

COMMENT: ASWFC HF Communications Warning 34 was issued on 5 April 
and is current for 6 Apr only. Maximum usable frequencies (MUFs) 
in the Australian region on UT day 05-Apr were initially near 
predicted values to 15% enhanced. However, Hobart was 30% depressed 
early in the UT day on 05-Apr during the interval 05/000-0300UT. 
Southern Australian region MUFs are depressed 30% after local 
dawn this morning. Strong spread F was observed at Hobart during 
local night hours. Southern Australian region MUFs are expected 
to be depressed 30% for the local day today. Northern Australian 
region MUFs are expected to be near predicted monthly values 
to 15% enhanced.

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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