[Ips-dhfpr] ASWFC Daily HF Prop Report - 21 December 24 issued 2330 UT on 21 Dec 2024 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/21 DECEMBER 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (21 DECEMBER) 
Date   T index  Conditions    
21 Dec   127    Normal-fair    

Flares    Max     Fadeout    Freq.  Sectors
  M1.9    0039UT  possible   lower  West Pacific

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Mostly near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Nov      127
Dec      117
Jan      114


2. FORECAST (22 DECEMBER - 24 DECEMBER)
Date   T index  Conditions       MUFs                              
22 Dec   120    Normal-fair      Near predicted monthly values
23 Dec   120    Normal-fair      Near predicted monthly values    
24 Dec   120    Normal-fair      Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 147 was issued on 
21 December and is current for 21-23 Dec. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 21-Dec were mostly 
near predicted monthly values. Mild spread F was observed at 
Hobart during local night. MUFs are expected to be near predicted 
monthly values over 22-24 Dec. 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