[Ips-dhfpr] SWS Daily HF Prop Report - 17 December 17 issued 2330 UT on 17 Dec 2017 [SEC=UNCLASSIFIED]

[Regional Warning Centre]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/17 DECEMBER 2017 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     6    Fair           

Flares: none.

MUFs:
   Cocos Island Region:
      No data available.
   Niue Island Region:
      Mostly near predicted monthly values.
      Depressed by 20% after local dawn.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Mostly near predicted monthly values.
   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      -5
Dec      4
Jan      4


2. FORECAST (18 DECEMBER - 20 DECEMBER)
Date   T index  Conditions       MUFs                              
18 Dec   -20    Normal           Depressed 15%/near predicted 
                                 monthly values
19 Dec   -30    Normal           15 to 20% below predicted monthly 
                                 values    
20 Dec   -10    Normal           Near predicted monthly values   

COMMENT: Minor MUF depressions to near monthly predicted MUFs 
were observed across Aus/NZ regions on UT day 17 December. Incidence 
of Sporadic E blanketing were mostly confined to Southern Australian 
regions. Moderately depressed MUFs are expected on 18-19 Dec, 
following the disturbed observed on 17 December associated with 
the coronal hole.

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