[Ips-dhfpr] SWS Daily HF Prop Report - 01 December 18 issued 2330 UT on 01 Dec 2018 [SEC=UNCLASSIFIED]

[Regional Warning Centre]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/01 DECEMBER 2018 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (01 DECEMBER) 
Date   T index  Conditions    
01 Dec   -34    Normal-fair    

Flares: none.

MUFs:
   Niue Island Region:
      Depressed by 20% during local day.
      Depressed by 30% during local night.
      Depressed by 20% after local dawn.
   Northern Australian Region:
      Mostly near predicted monthly values.
      Depressed by 20% after local dawn.
   Southern Australian Region:
      Depressed by 15% during local day.
      Depressed by 15% 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      -7
Jan      -8


2. FORECAST (02 DECEMBER - 04 DECEMBER)
Date   T index  Conditions       MUFs                              
02 Dec   -40    Normal-poor      10 to 40% below predicted monthly 
                                 values
03 Dec   -35    Normal-poor      10 to 40% below predicted monthly 
                                 values    
04 Dec   -30    Normal-fair      10 to 30% below predicted monthly 
                                 values   

COMMENT: SWS HF Communications Warning 19 was issued on 29 November 
and is current for 30 Nov to 2 Dec. Due to very low levels of 
ionising radiation from the Sun, MUF depressions of 15 to 30% 
were observed across the Australian region on UT day 1 December. 
Similar and even slightly higher levels of MUF depressions in 
the Australian region may be expected on UT days 2 and 3 December 
due to expected rise in geomagnetic activity levels on these 
days and due to the continued very low levels of ionising radiation 
from the Sun. Minor to moderate MUF depressions in this region 
are also likely to continue on UT day 4 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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