[Ips-dhfpr] SWS Daily HF Prop Report - 13 February 19 issued 2330 UT on 13 Feb 2019 [SEC=UNCLASSIFIED]

[Regional Warning Centre]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/13 FEBRUARY 2019 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (13 FEBRUARY) 
Date   T index  Conditions    
13 Feb   -15    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Depressed by 20% during local day.
      Enhanced by 35% during local night.
   Niue Island Region:
      Depressed by 25% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Depressed by 25% during local day.
      Enhanced by 30% during local night.
   Southern Australian Region:
      Near predicted monthly values.
   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      -27
Feb      -12
Mar      -13


2. FORECAST (14 FEBRUARY - 16 FEBRUARY)
Date   T index  Conditions       MUFs                              
14 Feb   -20    Normal-fair      Near predicted monthly values/depressed 
                                 10 to 25%
15 Feb   -20    Normal-fair      Near predicted monthly values/depressed 
                                 10 to 25%    
16 Feb   -20    Normal-fair      Near predicted monthly values/depressed 
                                 10 to 25%   

COMMENT: On UT day 13 February, MUFs were mostly near predicted 
monthly values across Southern Australian region. In Northern 
Australian region the HF propagation conditions were variable, 
with both mild enhancements during local night and mild to moderate 
depressions during local day. During the next three UT days, 
14-16 February mild to moderate depressions are likely due to 
continued very low levels of ionising radiation from the Sun 
and the recent increase in geomagnetic activity on UT day 13 
February.

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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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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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