[Ips-dhfpr] ASWFC Daily HF Prop Report - 12 December 24 issued 2330 UT on 12 Dec 2024 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/12 DECEMBER 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (12 DECEMBER) 
Date   T index  Conditions    
12 Dec   148    Fair-normal    

Flares    Max     Fadeout    Freq.  Sectors
  M2.2    1743UT  possible   lower  South American/
                                    Atlantic
  M1.6    2107UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Enhanced by 25% during local day.
      Enhanced by 15% during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Southern Australian Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   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 (13 DECEMBER - 15 DECEMBER)
Date   T index  Conditions       MUFs                              
13 Dec   150    Normal           Near to 15% above predicted 
                                 monthly values
14 Dec   150    Normal           Near to 15% above predicted 
                                 monthly values    
15 Dec   150    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 143 was issued on 
11 December and is current for 11-13 Dec. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 12-Dec were near predicted 
monthly values with enhancements of up to 15% in the northern 
Australian region during local night and in the southern Australian 
region during local day. Sporadic E was observed at Hobart over 
almost the entire day. MUFs are expected to be near predicted 
monthly values to 15% enhanced over 13-15 Dec, with sporadic 
E likely at Hobart on 13-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