[Ips-dhfpr] SWS Daily HF Prop Report - 05 December 18 issued 2330 UT on 05 Dec 2018 [SEC=UNCLASSIFIED]

[Regional Warning Centre]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/05 DECEMBER 2018 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (05 DECEMBER) 
Date   T index  Conditions    
05 Dec   -31    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Depressed by 30% during local day.
      Depressed by 15% during local night.
   Northern Australian Region:
      Depressed by 20% during local day.
      No data available 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 (06 DECEMBER - 08 DECEMBER)
Date   T index  Conditions       MUFs                              
06 Dec   -30    Normal-fair      Depressed 15 to 25%/near predicted 
                                 monthly values
07 Dec   -30    Normal-fair      Depressed 15 to 25%/near predicted 
                                 monthly values    
08 Dec   -30    Normal-fair      Depressed 15 to 25%/near predicted 
                                 monthly values   

COMMENT: Due to very low levels of ionising radiation from the 
Sun, MUF depressions of 15% to 20% were observed across the Australian 
region during local day on UT day 5 December. Sporadic E layers 
were seen across the Australian region and in Antarctica. Similar 
levels of MUF depressions in the Australian region are expected 
to continue on UT days 6-8 December. Stronger depressions are 
possible on 8 December as a consequence of the predicted 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.

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