[Ips-dhfpr] ASWFC Daily HF Prop Report - 24 December 22 issued 2330 UT on 24 Dec 2022 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/24 DECEMBER 2022
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (24 DECEMBER) 
Date   T index  Conditions    
24 Dec    57    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Enhanced by 15% during local day.
      Enhanced by 35% during local night.
   Northern Australian Region:
      Depressed by 20% during local day.
      Near predicted monthly values during local night.
   Southern Australian Region:
      Mostly near predicted monthly values.
      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
Nov      77
Dec      70
Jan      70


2. FORECAST (25 DECEMBER - 27 DECEMBER)
Date   T index  Conditions       MUFs                              
25 Dec    60    Normal-fair      Near predicted monthly values 
                                 to 20% depressed
26 Dec    70    Normal           Near predicted monthly values    
27 Dec    70    Normal           Near predicted monthly values   

COMMENT: ASWFC HF Communications Warning 102 was issued on 23 
December and is current for 24-25 Dec. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 24-Dec were mostly 
near predicted values, with some depressions up to 25% during 
local day and after local dawn. Strong sporadic-E was observed 
at most sites. MUFs are expected to be near predicted monthly 
values over 25-27 Dec, with sporadic-E likely to persist over 
the period. Mild depressions are possible on 25-Dec due to recent 
mild 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.

Australian Space Weather Forecasting Centre
Bureau of Meteorology
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au