[Ips-dhfpr] ASWFC Daily HF Prop Report - 25 April 26 issued 2331 UT on 25 Apr 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/25 APRIL 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (25 APRIL) 
Date   T index  Conditions    
25 Apr    77    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.3    0759UT  possible   lower  Mid East/Indian
  M1.1    1430UT  possible   lower  South American/
                                    Atlantic

MUFs:
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values.
   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 (26 APRIL - 28 APRIL)
Date   T index  Conditions       MUFs                              
26 Apr    60    Fair             Depressed 15%/near predicted 
                                 monthly values
27 Apr    60    Normal           Depressed 15%/near predicted 
                                 monthly values    
28 Apr    75    Normal           Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 42 was issued on 
25 April and is current for 26-28 Apr. Maximum Usable Frequencies 
(MUFs) in the Australian region were near predicted monthly values 
on UT day 25-Apr. Spread-F was observed at Hobart. MUFs are expected 
to be near predicted monthly values to 15% depressed over 26-27 
Apr due to forecast geomagnetic activity, then recover to near 
predicted monthly values on 28-Apr. 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