[Ips-dhfpr] ASWFC Daily HF Prop Report - 30 April 23 issued 2330 UT on 30 Apr 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/30 APRIL 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (30 APRIL) 
Date   T index  Conditions    
30 Apr   100    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M2.4    2028UT  possible   lower  East Pacific/
                                    North American

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

PCA Event : No event.

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


2. FORECAST (01 MAY - 03 MAY)
Date   T index  Conditions       MUFs                              
01 May   105    Normal           Near to 15% above predicted 
                                 monthly values
02 May   105    Normal           Near to 15% above predicted 
                                 monthly values    
03 May   105    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 30-Apr in 
the Australian region were near predicted monthly values during 
local day, with enhancements of up to 20% in the northern Australian 
region during local night and depressions of up to 15% in the 
southern Australian region during local night. Spread F was observed 
at Hobart and Canberra during local night hours. Sporadic E was 
observed at Canberra, Brisbane, Hobart and Perth during local 
night hours. MUFs are expected to be near predicted monthly values 
to 15% enhanced over 1-3 May. 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