[Ips-dhfpr] ASWFC Daily HF Prop Report - 09 December 22 issued 2331 UT on 09 Dec 2022 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/09 DECEMBER 2022
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (09 DECEMBER) 
Date   T index  Conditions    
09 Dec    86    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 30% during local night.
   Northern Australian Region:
      Depressed by 15% during local day.
      Near predicted monthly values during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 20% 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      77
Dec      70
Jan      70


2. FORECAST (10 DECEMBER - 12 DECEMBER)
Date   T index  Conditions       MUFs                              
10 Dec    80    Normal           Near predicted monthly values
11 Dec    85    Normal           Near predicted monthly values    
12 Dec    85    Normal           Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 9-Dec were near predicted monthly values with 
depressions of up to 15% in the northern Australian region during 
local day and enhancements of up to 20% in the southern Australian 
region during local night. Significant sporadic E was observed 
across the Australian region, mostly impacting lower frequencies. 
MUFs are expected to be generally near predicted monthly values 
over 10-12 Dec with mild depressions possible on 10-Dec due to 
waning, but ongoing, coronal hole high speed wind stream effects. 
Sporadic E can also be expected across the Australian region 
primarily affecting lower frequencies. Shortwave fadeouts are 
possible.

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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