[Ips-dhfpr] ASWFC Daily HF Prop Report - 28 December 22 issued 2331 UT on 28 Dec 2022 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/28 DECEMBER 2022
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (28 DECEMBER) 
Date   T index  Conditions    
28 Dec    57    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Niue Island Region:
      Enhanced by 25% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Depressed by 20% 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 (29 DECEMBER - 31 DECEMBER)
Date   T index  Conditions       MUFs                              
29 Dec    60    Normal           Near predicted monthly values
30 Dec    60    Normal           Near predicted monthly values    
31 Dec    60    Normal           Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 105 was issued on 
27 December and is current for 27-29 Dec. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 28-Dec were mostly 
near predicted monthly values to 20% depressed in southern Australian 
regions. Spread F was observed at Hobart during local night. 
Sporadic E was observed at several middle latitude sites. MUFs 
are generally expected to be near predicted monthly values over 
29-31 Dec, with depressions of 15% for southern Australian region 
early today then recovering. Isolated minor 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