[Ips-dhfpr] ASWFC Daily HF Prop Report - 11 December 24 issued 2330 UT on 11 Dec 2024 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/11 DECEMBER 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (11 DECEMBER) 
Date   T index  Conditions    
11 Dec   128    Fair-normal    

Flares    Max     Fadeout    Freq.  Sectors
  M2.0    0604UT  possible   lower  Mid East/Indian
  M2.8    1006UT  possible   lower  European
  M6.7    1550UT  probable   lower  South American/
                                    Atlantic

MUFs:
   Cocos Island Region:
      Enhanced by 30% during local day.
      Enhanced by 40% during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      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 (12 DECEMBER - 14 DECEMBER)
Date   T index  Conditions       MUFs                              
12 Dec   130    Normal-fair      Near predicted monthly values
13 Dec   130    Normal-fair      Near predicted monthly values    
14 Dec   130    Normal-fair      Near 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 11-Dec were near predicted 
monthly values. Sporadic E was observed at multiple locations 
in the Australian region during local night, with more severe 
conditions at Canberra and Hobart. MUFs are expected to be near 
predicted monthly values over 12-14 Dec, with sporadic E likely 
at Hobart and Canberra on 12-Dec. Shortwave fadeouts are possible.

----------------------------------------------------------
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