[Ips-dhfpr] ASWFC Daily HF Prop Report - 03 April 26 issued 2330 UT on 03 Apr 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/03 APRIL 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (03 APRIL) 
Date   T index  Conditions    
03 Apr    65    Fair-poor      

Flares    Max     Fadeout    Freq.  Sectors
  M1.3    0756UT  possible   lower  Mid East/Indian
  M1.3    1250UT  possible   lower  European

MUFs:
   Cocos Island Region:
      Enhanced by 30% during local day.
      Near predicted monthly values during local night.
      Enhanced by 20% after local dawn.
   Niue Island Region:
      Enhanced by 30% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Mostly near predicted monthly values.
      Depressed by 35% after local dawn.
   Southern Australian Region:
      Depressed by 40% during local day.
      Depressed by 20% during local night.
      Depressed by 30% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 15% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Mar      92
Apr      83
May      81


2. FORECAST (04 APRIL - 06 APRIL)
Date   T index  Conditions       MUFs                              
04 Apr    50    Fair             Depressed 20 to 30%/near predicted 
                                 monthly values
05 Apr    65    Fair-normal      Depressed 10 to 15%/near predicted 
                                 monthly values    
06 Apr    80    Normal-fair      Near predicted monthly values   

COMMENT: ASWFC HF Communications Warning 33 was issued on 3 April 
and is current for 4-5 Apr. Maximum Usable Frequencies (MUFs) 
in the Southern Australian region were depressed by 20-40% across 
the entire UT day 03-Apr due to ongoing geomagnetic activity. 
Spread F was observed in Brisbane, Perth, and Hobart, and sporadic-E 
was also observed in Hobart, Perth, and Canberra. MUFs in the 
Northern Australian region were near monthly predicted values 
across the UT day, with some enhancements seen at Niue Island 
and the Cocos Islands. MUFs were depressed by up to 15% in the 
Antarctic region over the last 24 hours. MUFs are expected to 
remain depressed by up to 30% in the Australian region over UT 
day 04-Apr, predominantly in the Southern Australian region, 
due to the ongoing geomagnetic activity. Conditions are expected 
to slowly trend towards predicted monthly values over 05-06 Apr 
as this geomagnetic activity eases. 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