[Ips-dhfpr] SWS Daily HF Prop Report - 21 February 18 issued 2245 UT on 21 Feb 2018 [SEC=UNCLASSIFIED]

[rwc]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/21 FEBRUARY 2018 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (21 FEBRUARY) 
Date   T index  Conditions    
21 Feb   -11    Normal         

Flares: none.

MUFs:
   Niue Island Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   Northern Australian Region:
      Depressed by 15% during local day.
      Near predicted monthly values during local night.
   Southern Australian Region:
      Near predicted monthly values 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
Jan      -6
Feb      4
Mar      3


2. FORECAST (22 FEBRUARY - 24 FEBRUARY)
Date   T index  Conditions       MUFs                              
22 Feb     0    Normal           Near predicted monthly values
23 Feb     0    Normal           Near predicted monthly values    
24 Feb     0    Normal           Near predicted monthly values   

COMMENT: MUFs were mostly near predicted monthly values for the 
Australian region during the UT day 21 Feb. However periods of 
minor depressions were noted in the Northern Australian region 
during local day time hours and in the Southern Australian region 
during local night time hours. There were a few cases of Sporadic 
E blanketing over the Australian and other Oceanic ionosonde 
sites. For 22-24 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
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Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp-out.sws.bom.gov.au
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