[Ips-dhfpr] ASWFC Daily HF Prop Report - 29 April 23 issued 2331 UT on 29 Apr 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/29 APRIL 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (29 APRIL) 
Date   T index  Conditions    
29 Apr   100    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 45% during local day.
      Near predicted monthly values during local night.
      Enhanced by 20% after local dawn.
   Niue Island Region:
      Enhanced by 15% during local day.
      Depressed by 15% during local night.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 35% over the UT day.

PCA Event : No event.

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


2. FORECAST (30 APRIL - 02 MAY)
Date   T index  Conditions       MUFs                              
30 Apr   100    Normal           Near to 15% above predicted 
                                 monthly values
01 May   100    Normal           Near to 15% above predicted 
                                 monthly values    
02 May   100    Normal-fair      Near to 15% above predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 40 was issued on 
28 April and is current for 28-30 Apr. Maximum usable frequencies 
(MUFs) on UT day 29-Apr in the Australian region were near predicted 
monthly values, with mild enhancements during local day. Spread 
F was observed at Hobart and Canberra during local night hours. 
Sporadic E was observed at Brisbane, Cocos Islands, Hobart, Learmonth 
and Townsville during local night hours. MUFs are expected to 
be near predicted monthly values to 15% enhanced over 30-Apr 
to 2-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