[Ips-dhfpr] SWS Daily HF Prop Report - 19 December 19 issued 2336 UT on 19 Dec 2019

[rwc]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/19 DECEMBER 2019 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (19 DECEMBER) 
Date   T index  Conditions    
19 Dec   -16    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Depressed by 15% during local day.
      Enhanced by 30% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Mostly near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 15% over the UT day.

PCA Event : No event.

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


2. FORECAST (20 DECEMBER - 22 DECEMBER)
Date   T index  Conditions       MUFs                              
20 Dec   -25    Normal           Near predicted monthly values/depressed 
                                 10 to 30%
21 Dec   -30    Normal           Near predicted monthly values/depressed 
                                 10 to 30%    
22 Dec   -30    Normal           Near predicted monthly values/depressed 
                                 10 to 30%   

COMMENT: Maximum usable frequencies (MUFs) were mainly near predicted 
monthly values for the Australian region on UT day 19 December. 
The Niue Island Region observed Mild to Moderate depressions. 
MUFs in the Antarctic region were mildly depressed over the UT 
day. Sporadic-E occurrences were seen over most sites. In the 
Australian region, MUFs are expected to be mainly near the monthly 
predicted levels for the next three UT days, 20-22 December, 
but may experience some mild to moderate depressions.

----------------------------------------------------------
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
Bureau of Meteorology
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Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp-out.sws.bom.gov.au
tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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