[Ips-dhfpr] SWS Daily HF Prop Report - 25 January 19 issued 2330 UT on 25 Jan 2019 [SEC=UNCLASSIFIED]

[Regional Warning Centre]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/25 JANUARY 2019 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (25 JANUARY) 
Date   T index  Conditions    
25 Jan   -19    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 15% during local night.
   Niue Island Region:
      Depressed by 35% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Depressed by 25% during local day.
      Enhanced by 15% during local night.
      Enhanced by 20% after local dawn.
   Southern Australian Region:
      Depressed by 20% 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
Dec      -32
Jan      -12
Feb      -13


2. FORECAST (26 JANUARY - 28 JANUARY)
Date   T index  Conditions       MUFs                              
26 Jan   -25    Normal           Near predicted monthly values/depressed 
                                 10 to 30%
27 Jan   -20    Normal           Near predicted monthly values/depressed 
                                 10 to 25%    
28 Jan   -20    Normal           Near predicted monthly values/depressed 
                                 10 to 25%   

COMMENT: On UT day 25 January, MUFs were slightly depressed over 
most Australian region as the aftermath of the recent geomagnetic 
disturbance associated with the coronal hole. Near predicted 
to depressed MUFs are expected for the next three UT days, 26-28 
January, as a consequence of very low levels of ionising radiation 
from the Sun and recent disturbed geomagnetic conditions associated 
with the coronal hole.

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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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