[Ips-dhfpr] SWS Daily HF Prop Report - 24 December 21 issued 2331 UT on 24 Dec 2021

[Regional Warning Centre]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/24 DECEMBER 2021 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (24 DECEMBER) 
Date   T index  Conditions    
24 Dec    71    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Mostly near predicted monthly values.
      Enhanced by 30% after local dawn.
   Niue Island Region:
      Enhanced by 20% during local day.
      Enhanced by 50% during local night.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 35% during local night.
   Southern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 15% during local night.
   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 (25 DECEMBER - 27 DECEMBER)
Date   T index  Conditions       MUFs                              
25 Dec    55    Normal           Near to 20% above predicted 
                                 monthly values
26 Dec    40    Normal           Near predicted monthly values    
27 Dec    40    Normal           Near predicted monthly values   

COMMENT: SWS SWF HF Communications Warning 42 was issued on 22 
December and is current for 23-25 Dec. MUFs in the Australian 
region on UT day 24 December were 15-30% above predicted monthly 
values. Sporadic E was observed at some stations. MUFs are expected 
to be near predicted monthly values to enhanced with possible 
daylight fadeouts on UT days 25-27 December.

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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
tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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