[Ips-dhfpr] SWS Daily HF Prop Report - 06 December 17 issued 2330 UT on 06 Dec 2017 [SEC=UNCLASSIFIED]

Regional Warning Centre rwc at ips.gov.au
Thu Dec 7 10:30:26 EST 2017


SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/06 DECEMBER 2017 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (06 DECEMBER) 
Date   T index  Conditions    
06 Dec   -17    Normal-fair    

Flares: none.

MUFs:
   Niue Island Region:
      Mostly near predicted monthly values.
      Depressed by 20% after local dawn.
   Northern Australian Region:
      Depressed by 35% 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.
      Depressed by 20% after local dawn.
   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 (07 DECEMBER - 09 DECEMBER)
Date   T index  Conditions       MUFs                              
07 Dec   -15    Normal-fair      Near predicted monthly values/depressed 
                                 10 to 30%
08 Dec   -10    Normal           Near predicted monthly values/depressed 
                                 10 to 20%    
09 Dec    -5    Normal           Near predicted monthly values   

COMMENT: SWS HF Communications Warning 52 was issued on 5 December 
and is current for 5-7 Dec. Minor to moderate MUF depressions 
were observed across Aus/NZ regions on UT day 6 December. Spread 
F and Sporadic E blanketing were observed at several low and 
mid latitude locations. Minor to moderate MUF depressions are 
likely to be observed in the Aus/NZ regions during the next two 
days (7 to 8 December). HF conditions may return to more normal 
levels in this region on 9 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
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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