[Ips-dhfpr] ASWFC Daily HF Prop Report - 31 December 22 issued 2331 UT on 31 Dec 2022 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/31 DECEMBER 2022
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (31 DECEMBER) 
Date   T index  Conditions    
31 Dec    68    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Northern Australian Region:
      Depressed by 15% during local day.
      Near predicted monthly values during local night.
   Southern Australian Region:
      Depressed by 15% during local day.
      Near predicted monthly values 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 (01 JANUARY - 03 JANUARY)
Date   T index  Conditions       MUFs                              
01 Jan    80    Normal           Near predicted monthly values
02 Jan    80    Normal           Near predicted monthly values    
03 Jan    80    Normal           Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 107 was issued on 
30 December and is current for 30 Dec to 1 Jan. Maximum usable 
frequencies (MUFs) in the Australian region on UT day 31-Dec 
were generally depressed 15%. Strong sporadic E was observed 
at Norfolk Island. MUFs are generally expected to be near predicted 
monthly values with brief mild depressions after local dawn for 
the southern Australian region. Isolated minor fadeouts are possible. 
Degraded HF conditions may be experienced 04-05 Jan for the southern 
Australian region during local night hours.

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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