[Ips-dhfpr] SWS Daily HF Prop Report - 12 December 17 issued 2330 UT on 12 Dec 2017 [SEC=UNCLASSIFIED]

[Regional Warning Centre]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/12 DECEMBER 2017 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (12 DECEMBER) 
Date   T index  Conditions    
12 Dec   -29    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      No data available
   Niue Island Region:
      Depressed by 20% during local day.
      Depressed by 15% during local night.
   Northern Australian Region:
      Depressed by 20% during local day.
      Depressed by 15% during local night.
   Southern Australian Region:
      Depressed by 15% during local day.
      Depressed by 20% 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      -5
Dec      4
Jan      4


2. FORECAST (13 DECEMBER - 15 DECEMBER)
Date   T index  Conditions       MUFs                              
13 Dec   -20    Normal           Depressed 15%/near predicted 
                                 monthly values
14 Dec   -16    Normal           Near predicted monthly values    
15 Dec    -5    Normal           Near predicted monthly values   

COMMENT: SWS HF Communications Warning 53 was issued on 12 December 
and is current for 13-14 Dec. Minor to moderate MUF depressions 
were observed across Aus/NZ regions on UT day 12 December. Sporadic 
E blanketing were observed at several low and mid latitude locations. 
Minor to moderate MUF depressions and degradations in HF conditions 
are possible in the region from 13 to 14 December. These depression 
are the aftermath of disturbed conditions associated with the 
coronal hole

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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
PO Box 1386                         WWW: http://www.sws.bom.gov.au
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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