[Ips-dhfpr] SWS Daily HF Prop Report - 28 November 18 issued 2330 UT on 28 Nov 2018 [SEC=UNCLASSIFIED]

[Regional Warning Centre]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/28 NOVEMBER 2018 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (28 NOVEMBER) 
Date   T index  Conditions    
28 Nov   -37    Normal-fair    

Flares: none.

MUFs:
   Niue Island Region:
      Depressed by 25% during local day.
      Depressed by 30% during local night.
      Depressed by 25% after local dawn.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 15% during local night.
   Southern Australian Region:
      Depressed by 20% during local day.
      Near predicted monthly values during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 15% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Oct      -17
Nov      -7
Dec      -7


2. FORECAST (29 NOVEMBER - 01 DECEMBER)
Date   T index  Conditions       MUFs                              
29 Nov   -30    Normal-fair      Near predicted monthly values/depressed 
                                 10 to 30%
30 Nov   -30    Normal-fair      Near predicted monthly values/depressed 
                                 10 to 30%    
01 Dec   -35    Normal-poor      Near predicted monthly values/depressed 
                                 10 to 40%   

COMMENT: SWS HF Communications Warning 18 was issued on 26 November 
and is current for 27-29 Nov. Due to the very low levels of ionising 
radiation from the Sun, MUF depressions of 15 to 30% were observed 
across the Australian region on UT day 28 November. Similar levels 
of MUF depressions in the Australian region may be expected for 
the next 2 days (UT days 29 to 30 November) as the levels of 
ionising radiation are likely to stay at very low levels throughout 
this period. Further MUF depressions are likely on UT day 1 December 
due to expected rise in geomagnetic activity levels on this day 
and due to the continued very low levels of ionising radiation 
from the Sun.

----------------------------------------------------------
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
tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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