[Ips-dhfpr] ASWFC Daily HF Prop Report - 23 December 24 issued 2330 UT on 23 Dec 2024 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/23 DECEMBER 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (23 DECEMBER) 
Date   T index  Conditions    
23 Dec   114    Normal-fair    

Flares    Max     Fadeout    Freq.  Sectors
  M1.0    0231UT  possible   lower  E. Asia/Aust.
  M1.0    0629UT  possible   lower  Mid East/Indian
  M9.0    1112UT  probable   lower  European

MUFs:
   Cocos Island Region:
      Mostly near predicted monthly values.
   Niue Island Region:
      Mostly near predicted monthly values.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Mostly near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 15% over the UT day.

PCA Event : No event.

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


2. FORECAST (24 DECEMBER - 26 DECEMBER)
Date   T index  Conditions       MUFs                              
24 Dec   120    Normal-fair      Near predicted monthly values 
                                 to 10-15% depressed
25 Dec   115    Normal-fair      Near predicted monthly values 
                                 to 10-15% depressed    
26 Dec   105    Normal-fair      Near predicted monthly values 
                                 to 15% depressed   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 23-Dec were mostly near predicted values. Sporadic 
E was common at most sites during local night hours. Polar cap 
absorption affected mid to high latitudes. MUFs are expected 
to be near predicted values to 15% depressed over 24-26 Dec due 
to multiple CME impacts expected. Sporadic E is expected to continue.

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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