[Ips-dhfpr] ASWFC Daily HF Prop Report - 09 April 26 issued 2330 UT on 09 Apr 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/09 APRIL 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (09 APRIL) 
Date   T index  Conditions    
09 Apr    80    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.0    0845UT  possible   lower  Mid East/Indian

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

PCA Event : No event.

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


2. FORECAST (10 APRIL - 12 APRIL)
Date   T index  Conditions       MUFs                              
10 Apr    65    Normal-fair      Depressed 10 to 15%/near predicted 
                                 monthly values
11 Apr    70    Normal-fair      Depressed 10 to 15%/near predicted 
                                 monthly values    
12 Apr    82    Normal           Near predicted monthly values   

COMMENT: Maximum Usable Frequencies (MUFs) in the Australian 
region were mostly near predicted monthly values on 09-Apr, with 
some depressions of up to 15% during local night hours. Enhancements 
of 20-45% were observed at the Cocos Islands. Sporadic-E was 
observed in Canberra and Darwin, with spread F also observed 
in Hobart. MUFs are forecast to become depressed by 10-15% during 
10-11 Apr due to upcoming coronal hole high speed wind stream 
effects. These will begin to trend towards predicted values on 
12-Apr as the high speed wind stream effects begin to subside.

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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