[Ips-dhfpr] SWS Daily HF Prop Report - 17 September 21 issued 2353 UT on 17 Sep 2021

[rwc]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/17 SEPTEMBER 2021 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (17 SEPTEMBER) 
Date   T index  Conditions    
17 Sep    14    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 25% during local night.
   Niue Island Region:
      No data available.
   Northern Australian Region:
      Depressed by 15% during local day.
      Depressed by 20% during local night.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 30% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Aug      14
Sep      27
Oct      30


2. FORECAST (18 SEPTEMBER - 20 SEPTEMBER)
Date   T index  Conditions       MUFs                              
18 Sep     5    Normal-fair      Near predicted monthly values/depressed 
                                 15 to 25%
19 Sep    15    Normal           Near predicted monthly values    
20 Sep    15    Normal           Near predicted monthly values   

COMMENT: MUFs in the Australian region on UT day 17 September 
were mostly near predicted monthly values. Some moderately depressed 
MUFs were observed in the Cocos Island region during the local 
night. MUFs in the Australian region on UT days 18-20 September 
are expected to be near predicted monthly values to mildly depressed. 
Moderate depressions likely on 18 September.

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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.

Space Weather Services              email: asfc at bom.gov.au
Bureau of Meteorology
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Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp-out.sws.bom.gov.au
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