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

[Regional Warning Centre]

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

1. SUMMARY (24 MAY) 
Date   T index  Conditions    
24 May    96    Normal-fair    

Flares    Max     Fadeout    Freq.  Sectors
  M1.0    0958UT  possible   lower  Mid East/Indian
  M1.8    1722UT  possible   lower  South American/
                                    Atlantic

MUFs:
   Cocos Island Region:
      Enhanced by 55% during local day.
      Enhanced by 20% during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Depressed by 25% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Apr      120
May      87
Jun      88


2. FORECAST (25 MAY - 27 MAY)
Date   T index  Conditions       MUFs                              
25 May   100    Normal-fair      Near predicted monthly values
26 May   110    Normal           Near predicted monthly values 
                                 to 15% enhanced    
27 May   115    Normal           Near predicted monthly values 
                                 to 20% enhanced   

COMMENT: ASWFC SWF HF Communications Warning 49 was issued on 
22 May and is current for 23-25 May. Maximum usable frequencies 
(MUFs) on UT day 24-May were near predicted monthly values. Spread-F 
was observed in Hobart during local night hours. Conditions were 
mildly degraded in low latitude sites such as Cocos Islands and 
Norfolk Island. MUFs are expected to be near predicted monthly 
values over 25-27 May, with enhancements of 15-20% possible later 
in the period. Shortwave fadeouts are probable.

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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