[Ips-dhfpr] SWS Daily HF Prop Report - 17 December 19 issued 2345 UT on 17 Dec 2019

[rwc]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/17 DECEMBER 2019 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (17 DECEMBER) 
Date   T index  Conditions    
17 Dec   -36    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   Niue Island Region:
      Depressed by 35% during local day.
      Depressed by 15% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   Southern Australian Region:
      Depressed by 15% during local day.
      Near predicted monthly values during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Nov      -30
Dec      -16
Jan      -17


2. FORECAST (18 DECEMBER - 20 DECEMBER)
Date   T index  Conditions       MUFs                              
18 Dec   -35    Normal-fair      Near predicted monthly values/depressed 
                                 10 to 30%
19 Dec   -35    Normal           Near predicted monthly values/depressed 
                                 10 to 30%    
20 Dec   -35    Normal           Near predicted monthly values/depressed 
                                 10 to 30%   

COMMENT: Maximum usable frequencies (MUFs) were mostly near predicted 
monthly values to depressed by 15-35% for the Australian region 
on 17 December. MUFs in the Antarctic region were mostly near 
monthly predicted values. Sporadic-E occurrences were seen over 
some sites. In the Australian regions, Minor to Moderate MUFs 
depressions may be observed compared to the monthly predicted 
levels for the next three UT days, 18-20 December.

----------------------------------------------------------
For an explanation of some of the terms in this report, go to
http://www.sws.bom.gov.au, and follow links to Educational->
Glossary on Solar Terrestrial Terms.

Space Weather Services              email: asfc at bom.gov.au
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