[Ips-dhfpr] SWS Daily HF Prop Report - 18 October 21 issued 2331 UT on 18 Oct 2021

[Regional Warning Centre]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/18 OCTOBER 2021 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (18 OCTOBER) 
Date   T index  Conditions    
18 Oct   -14    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      No data available.
   Niue Island Region:
      No data available.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   Southern Australian Region:
      Depressed by 30% during local day.
      Depressed by 25% during local night.
      Depressed 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
Sep      24
Oct      29
Nov      33


2. FORECAST (19 OCTOBER - 21 OCTOBER)
Date   T index  Conditions       MUFs                              
19 Oct     0    Normal-fair      Near predicted monthly values/depressed 
                                 10 to 30%
20 Oct     0    Normal-fair      Near predicted monthly values/depressed 
                                 10 to 30%    
21 Oct     5    Normal-fair      Near predicted monthly values/depressed 
                                 10 to 20%   

COMMENT: MUFs in the Australian region on UT day 18 October were 
mostly near predicted monthly values, with some mild depressions 
in the northern Australian region during the local night and 
some moderate depressions on the Southern Australian region. 
MUFs are expected to be mostly near predicted monthly values 
on UT days 19-21 October, with some mild to moderate depressions 
due to the expected increase in geomagnetic activity.

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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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