[Ips-dhfpr] IPS Daily HF Prop Report - 19 May 13 issued 2330 UT on 19 May 2013

[Regional Warning Centre]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/19 MAY 2013 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (19 MAY) 
Date   T index  Conditions    
19 May    90    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 25% during local day.
      Enhanced by 30% during local night.
   Niue Island Region:
      Mostly near predicted monthly values.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian and New Zealand Region:
      Mostly near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Predicted Monthly T index for May:  69


2. FORECAST (20 MAY - 22 MAY)
Date   T index  Conditions       MUFs                              
20 May    90    Fair             Near to 15% above predicted 
                                 monthly values
21 May    70    Normal           Near predicted monthly values    
22 May    70    Normal           Near predicted monthly values   

COMMENT: IPS Preliminary HF Communications Warning 11 was issued 
on 18 May and is current for 20-21 May. Mostly normal ionospheric 
support observed over the AUS/NZ region for the last 24 hours. 
Degraded HF conditions expected 20-May due to increased geomagnetic 
activity, particularly in S.Aus/NZ/Antarctic locations. MUFs 
expected to be mostly near predicted monthly values 20-May, with 
overnight depressions for Southern AUS/NZ regions. More widespread 
MUF depressions expected from 21-May. Some chance of short wave 
fadeouts 20-May due to solar active regions.

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For an explanation of some of the terms in this report, go to
http://www.ips.gov.au, and follow links to Educational->
Glossary on Solar Terrestrial Terms.

IPS Radio and Space Services        email: asfc at ips.gov.au
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