[Ips-dhfpr] ASWFC Daily HF Prop Report - 16 December 24 issued 2330 UT on 16 Dec 2024 [SEC=OFFICIAL]

Australian Space Weather Forecasting Centre aswfc at bom.gov.au
Tue Dec 17 10:30:44 AEDT 2024


SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/16 DECEMBER 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (16 DECEMBER) 
Date   T index  Conditions    
16 Dec   115    Fair           

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 25% during local day.
      Enhanced by 15% during local night.
   Niue Island Region:
      Enhanced by 15% during local day.
      Depressed by 15% during local night.
   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 (17 DECEMBER - 19 DECEMBER)
Date   T index  Conditions       MUFs                              
17 Dec   120    Fair             Near predicted monthly values
18 Dec   120    Normal-fair      Near predicted monthly values    
19 Dec   130    Normal           Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 144 was issued on 
15 December and is current for 15-17 Dec. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 16-Dec were mostly 
near predicted monthly values. Sporadic E was observed at Perth 
and Townsville during local night. Spread F was observed at Hobart 
during local night. MUFs are expected to be near predicted monthly 
vales over 17-19 Dec, with mild depressions possible on 17-18 
Dec due to anticipated geomagnetic activity. Sporadic E is more 
likely to be observed around the Australian region over December 
than at other times of the year. 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



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