[Ips-dhfpr] ASWFC Daily HF Prop Report - 21 August 23 issued 2330 UT on 21 Aug 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/21 AUGUST 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (21 AUGUST) 
Date   T index  Conditions    
21 Aug   118    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 30% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      Enhanced by 30% during local day.
      Enhanced by 55% during local night.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   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
Jul      103
Aug      88
Sep      84


2. FORECAST (22 AUGUST - 24 AUGUST)
Date   T index  Conditions       MUFs                              
22 Aug   115    Normal-fair      Near to 15% above predicted 
                                 monthly values
23 Aug   115    Normal           Near to 15% above predicted 
                                 monthly values    
24 Aug   120    Normal           Near to 1% above predicted monthly 
                                 values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 21-Aug were 
mostly near predicted values to 15% enhanced in the Australian 
region. Spread was observed in Brisbane and Townsville during 
local night hours. Sporadic-E was observed in Brisbane, Learmonth, 
Perth and Townsville during local night hours. MUFs are expected 
to remain near predicted values to 15% enhanced over 22-24 Aug.

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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