[Ips-dhfpr] SWS Daily HF Prop Report - 08 December 21 issued 2331 UT on 08 Dec 2021

[Regional Warning Centre]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/08 DECEMBER 2021 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (08 DECEMBER) 
Date   T index  Conditions    
08 Dec    12    Fair-normal    

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Depressed by 20%-30%.
   Northern Australian Region:
      Mostly near predicted monthly values.
   Southern Australian Region:
      Mostly near predicted monthly values.
   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
Nov      3
Dec      33
Jan      36


2. FORECAST (09 DECEMBER - 11 DECEMBER)
Date   T index  Conditions       MUFs                              
09 Dec     5    Normal-fair      Depressed 15 to 20%/near predicted 
                                 monthly values
10 Dec     5    Normal-fair      Depressed 15 to 20%/near predicted 
                                 monthly values    
11 Dec     5    Normal           Depressed 15 to 20%/near predicted 
                                 monthly values   

COMMENT: SWS HF Communications Warning 37 was issued on 6 December 
and is current for 7-9 Dec. MUFs in the Australian region on 
UT day 8 December were variable ranging from 30% depressed at 
times to near predicted monthly values, possibly due to low levels 
of ionising solar flux. Similar conditions are expected during 
9-11 December. Sporadic E observed during afternoon and evening 
hours at some stations.

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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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