[Ips-dhfpr] SWS Daily HF Prop Report - 18 May 17 issued 2330 UT on 18 May 2017 [SEC=UNCLASSIFIED]

[Regional Warning Centre]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/18 MAY 2017 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (18 MAY) 
Date   T index  Conditions    
18 May    14    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 25% 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.
      Enhanced by 15% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 15% over the UT day.

PCA Event : No event.

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


2. FORECAST (19 MAY - 21 MAY)
Date   T index  Conditions       MUFs                              
19 May     5    Normal-fair      Near predicted monthly values/depressed 
                                 10 to 20%
20 May     0    Fair-poor        20 to 40% below predicted monthly 
                                 values    
21 May     0    Fair-poor        20 to 40% below predicted monthly 
                                 values   

COMMENT: Minor to mild MUF depressions as well as enhancements 
were observed in the Aus regions today (18 May). MUFs and HF 
conditions are expected to stay mostly at normal levels in this 
region during first half of UT day 19 May. Minor to mild MUF 
depressions and degradation in HF conditions during the second 
half on 19 May, and minor to moderate MUF depressions and degradations 
in HF conditions may be expected in the Aus/NA regions on 20 
and 21 May due to an expected rise in geomagnetic activity during 
this period.

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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
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