[Ips-dhfpr] SWS Daily HF Prop Report - 23 April 17 issued 2330 UT on 23 Apr 2017 [SEC=UNCLASSIFIED]

[Regional Warning Centre]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/23 APRIL 2017 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (23 APRIL) 
Date   T index  Conditions    
23 Apr    22    Fair-poor      

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 25% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      Enhanced by 15% during local day.
      Enhanced by 30% during local night.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Southern Australian Region:
      Mostly near predicted monthly values.
      Depressed by 20% after local dawn.
   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
Mar      11
Apr      14
May      14


2. FORECAST (24 APRIL - 26 APRIL)
Date   T index  Conditions       MUFs                              
24 Apr     0    Fair             Near predicted monthly values/depressed 
                                 5 to 35%
25 Apr     5    Fair             Near predicted monthly values/depressed 
                                 5 to 15%    
26 Apr     5    Normal-fair      Near predicted monthly values/depressed 
                                 5 to 15%   

COMMENT: For the UT day, 23 April, MUFs over the Australian region 
were mostly at enhanced levels and near the monthly predicted 
value. Mild depressions were also observed over the Southern 
Australian region. The outlook for the next two days (24 and 
25 April) is for MUF levels to drop, but the MUFs are expected 
to remain near the predicted monthly levels. The degradations 
of MUFs are due to the storm induced ionospheric depression, 
which is expected to spread equatorwards from the polar regions.

----------------------------------------------------------
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
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Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp-out.sws.bom.gov.au
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