[Ips-dhfpr] SWS Daily HF Prop Report - 07 December 18 issued 2330 UT on 07 Dec 2018 [SEC=UNCLASSIFIED]

[Regional Warning Centre]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/07 DECEMBER 2018 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (07 DECEMBER) 
Date   T index  Conditions    
07 Dec   -24    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:    
      No data available.
   Niue Island Region:
      Near predicted monthly values during local day.
      Depressed by 15% during local night.
   Northern Australian Region:
      Depressed by 15% during local day.
      Near predicted monthly values 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      -32
Dec      -8
Jan      -9


2. FORECAST (08 DECEMBER - 10 DECEMBER)
Date   T index  Conditions       MUFs                              
08 Dec   -30    Normal-fair      Depressed 15 to 25%/near predicted 
                                 monthly values
09 Dec   -30    Normal-fair      Depressed 15 to 25%/near predicted 
                                 monthly values    
10 Dec   -30    Normal-fair      Depressed 15 to 25%/near predicted 
                                 monthly values   

COMMENT: SWS HF Communications Warning 23 was issued on 7 December 
and is current for 8-9 Dec. Due to very low levels of ionising 
radiation from the Sun, MUF depressions of 15% were observed 
across the Australian region on UT day 7 December. Sporadic E 
layers were seen across the Australian region. Stronger depressions 
are possible on 8-10 December as a consequence of the continued 
very low levels of ionising radiation from the Sun and recent 
increase in geomagnetic activity.

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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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