[Ips-dhfpr] ASWFC Daily HF Prop Report - 24 April 23 issued 2331 UT on 24 Apr 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/24 APRIL 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (24 APRIL) 
Date   T index  Conditions    
24 Apr   109    Fair-poor      

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      Enhanced by 15% during local day.
      Enhanced by 90% during local night.
      Enhanced by 35% after local dawn.
   Northern Australian Region:
      Enhanced by 20% during local day.
      Enhanced by 20-35% during local night and after local dawn.
   Southern Australian Region:
      Depressed by 40% during local day.
      Near predicted monthly values during local night.
      Enhanced by 20% after local dawn.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 35% over the UT day.

PCA Event : 10MeV Proton/PCA Event Began at 1800UT 23/04, Ended at 1900UT 23/04

Monthly T index:
Month  T index
Mar      132
Apr      84
May      84


2. FORECAST (25 APRIL - 27 APRIL)
Date   T index  Conditions       MUFs                              
25 Apr   115    Normal-fair      Near to 15% above predicted 
                                 monthly values
26 Apr   115    Normal           Near to 15% above predicted 
                                 monthly values    
27 Apr   115    Normal-fair      Near to 15% above predicted 
                                 monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 24-Apr in 
the Australian region were enhanced by 20-35% in Northern Australia 
and depressed by 40% in southern Australia due to recent increased 
geomagnetic activity. Sporadic-E was observed at Learmonth. Strong 
spread F was observed at Hobart and Perth during local night 
hours. MUFs are expected to be near predicted monthly values 
to 15% enhanced over 25-27 Apr. Mild degradations are possible 
during local night hours.

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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