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

[Regional Warning Centre]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/17 MAY 2017 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (17 MAY) 
Date   T index  Conditions    
17 May    11    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 20% during local day.
      Near predicted monthly values during local night.
      Enhanced by 20% after local dawn.
   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.
      Enhanced by 25% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 25% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Apr      14
May      12
Jun      12


2. FORECAST (18 MAY - 20 MAY)
Date   T index  Conditions       MUFs                              
18 May    10    Normal           Near predicted monthly values
19 May     5    Normal-fair      Near predicted monthly values/depressed 
                                 10 to 20%    
20 May     0    Fair-poor        Depressed 20 to 40%/near predicted 
                                 monthly values   

COMMENT: SWS HF Communications Warning 27 was issued on 15 May 
and is current for 16-18 May. Minor to mild MUF depressions as 
well as enhancements were observed in the Aus regions today (17 
May). MUFs and HF conditions are expected to stay mostly at normal 
levels in this region on 18 May. Minor to mild MUF depressions 
and degradation in HF conditions late on 19 May, and minor to 
moderate MUF depressions and degradations in HF conditions may 
be expected on 20 May due to an expected rise in geomagnetic 
activity from late on 19 May.

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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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