[Ips-dhfpr] ASWFC Daily HF Prop Report - 17 August 23 issued 2330 UT on 17 Aug 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/17 AUGUST 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (17 AUGUST) 
Date   T index  Conditions    
17 Aug   136    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 30% during local day.
      Enhanced by 45% during local night.
   Niue Island Region:
      Enhanced by 15% during local day.
      Enhanced by 25% during local night.
      Enhanced by 25% after local dawn.
   Northern Australian Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
   Southern Australian Region:
      Enhanced by 20% during local day.
      Enhanced by 25% during local night.
      Enhanced by 25% after local dawn.
   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 (18 AUGUST - 20 AUGUST)
Date   T index  Conditions       MUFs                              
18 Aug   125    Normal           Near to 25% above predicted 
                                 monthly values
19 Aug   125    Normal           Near to 20% above predicted 
                                 monthly values    
20 Aug   125    Normal           Near to 20% predicted monthly 
                                 values   

COMMENT: ASWFC SWF HF Communications Warning 80 was issued on 
17 August and is current for 17-19 Aug. Maximum usable frequencies 
(MUFs) on UT day 17-Aug were near predicted monthly values to 
25% enhanced in the Australian region. Spread was observed in 
Brisbane during local night hours. MUFs are expected to remain 
near predicted values to 20% enhanced over 18-20 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