[Ips-dhfpr] ASWFC Daily HF Prop Report - 17 May 24 issued 2330 UT on 17 May 2024 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/17 MAY 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (17 MAY) 
Date   T index  Conditions    
17 May   137    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M7.2    2108UT  probable   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 25% during local night.
   Niue Island Region:
      Enhanced by 25% during local day.
      Near predicted monthly values 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.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : 10MeV Proton/PCA Event Began at 1355UT 13/05, Ended at 1410UT 16/05

Monthly T index:
Month  T index
Apr      125
May      114
Jun      116


2. FORECAST (18 MAY - 20 MAY)
Date   T index  Conditions       MUFs                              
18 May   135    Normal-fair      Near to 15% above predicted 
                                 monthly values
19 May   135    Normal           Near to 15% above predicted 
                                 monthly values    
20 May   135    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 53 was issued on 
16 May and is current for 16-18 May. Maximum usable frequencies 
(MUFs) on UT day 17-May were near predicted monthly values to 
20% enhanced in Northern Australia. Spread F was observed at 
Hobart during local night hours. MUFs are expected to be near 
predicted monthly values to 15% enhanced over 18-20 May. 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