[Ips-dhfpr] SWS Daily HF Prop Report - 20 February 18 issued 2330 UT on 20 Feb 2018 [SEC=UNCLASSIFIED]

Regional Warning Centre rwc at ips.gov.au
Wed Feb 21 10:30:41 EST 2018


SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/20 FEBRUARY 2018 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (20 FEBRUARY) 
Date   T index  Conditions    
20 Feb    -4    Normal         

Flares: none.

MUFs:
   Niue Island Region:
      Enhanced by 25% during local day.
      Near predicted monthly values during local night.
      Depressed by 20% after local dawn.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 20% 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
Jan      -6
Feb      4
Mar      3


2. FORECAST (21 FEBRUARY - 23 FEBRUARY)
Date   T index  Conditions       MUFs                              
21 Feb     4    Normal           Near predicted monthly values
22 Feb     4    Normal           Near predicted monthly values    
23 Feb     4    Normal           Near predicted monthly values   

COMMENT: MUFs were mostly near predicted monthly values during 
the UT day 20 Feb with isolated periods of depressions noted 
over the Southern Australian region during local night time hours. 
There were a few cases of Sporadic E blanketing over the Australian 
ionosonde sites. For 21-23 Feb, MUFs are expected to be mostly 
near predicted monthly values. Minor to moderate depressions 
can occur, particularly in the Southern hemisphere as a consequence 
of the recent minor increase in geomagnetic activity and low 
EUV levels.

----------------------------------------------------------
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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