[Ips-dhfpr] ASWFC Daily HF Prop Report - 09 August 23 issued 2330 UT on 09 Aug 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/09 AUGUST 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (09 AUGUST) 
Date   T index  Conditions    
09 Aug   106    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 25% during local day.
      Enhanced by 65% during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 20% 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.
      Proton event in progress, increased absorption observed.

PCA Event : 10MeV Proton/PCA Event Began 08 08 2023 0105UT and is in progress

Monthly T index:
Month  T index
Jul      103
Aug      88
Sep      84


2. FORECAST (10 AUGUST - 12 AUGUST)
Date   T index  Conditions       MUFs                              
10 Aug   105    Normal           Near to 15% above predicted 
                                 monthly values
11 Aug   105    Normal           Near to 15% above predicted 
                                 monthly values    
12 Aug   105    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 78 was issued on 
8 August and is current for 9-11 Aug. Maximum usable frequencies 
(MUFs) on UT day 9-Aug were near predicted values in the Australian 
region. Spread-F was observed at Hobart, Canberra and Townsville. 
Scintillation was observed at Niue between 9/0929 - 0950 UT. 
Due to S1 solar radiation storm conditions, degraded conditions 
have been observed at high latitudes are expected to end during 
10-Aug. MUFs are expected to be near predicted values over 10-12 
Aug with enhancements of 15% possible. Isolated 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