[Ips-dhfpr] ASWFC Daily HF Prop Report - 27 December 24 issued 2330 UT on 27 Dec 2024 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/27 DECEMBER 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (27 DECEMBER) 
Date   T index  Conditions    
27 Dec   164    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.2    1538UT  possible   lower  South American/
                                    Atlantic
  M3.3    2035UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Northern Australian Region:
      Mostly near predicted monthly values.
      Enhanced by 25% after local dawn.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Enhanced by 15% over the UT day.

PCA Event : No event.

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


2. FORECAST (28 DECEMBER - 30 DECEMBER)
Date   T index  Conditions       MUFs                              
28 Dec   170    Normal           Near to 35% above predicted 
                                 monthly values
29 Dec   170    Normal           Near to 35% above predicted 
                                 monthly values    
30 Dec   170    Normal           Near to 35% above predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 149 was issued on 
27 December and is current for 28-30 Dec. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 27-Dec were near predicted 
values to 25% enhanced. Sporadic-E was common at most sites during 
local day and night hours. MUFs are expected to be near predicted 
values to 35% enhanced over 28-30 Dec.

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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