[Ips-dhfpr] SWS Daily HF Prop Report - 19 February 18 issued 2330 UT on 19 Feb 2018 [SEC=UNCLASSIFIED]

[Regional Warning Centre]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/19 FEBRUARY 2018 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (19 FEBRUARY) 
Date   T index  Conditions    
19 Feb    15    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Enhanced by 25% during local day.
      Near predicted monthly values during local night.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 20% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Jan      -6
Feb      4
Mar      3


2. FORECAST (20 FEBRUARY - 22 FEBRUARY)
Date   T index  Conditions       MUFs                              
20 Feb     4    Normal           Near predicted monthly values
21 Feb     4    Normal           Near predicted monthly values    
22 Feb     4    Normal           Near predicted monthly values   

COMMENT: MUFs were mostly near predicted monthly values during 
the UT day 19 Feb with isolated periods of depressions noted 
over the Australian region. There were a few cases of Sporadic 
E blanketing over the Australian ionosonde sites. The Antarctic 
region showed Minor depressions due to isolated periods of increased 
geomagnetic activity. For 20-22 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.

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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
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