[Ips-dhfpr] IPS Daily HF Prop Report - 18 May 13 issued 2330 UT on 18 May 2013

[Regional Warning Centre]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/18 MAY 2013 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (18 MAY) 
Date   T index  Conditions    
18 May    97    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 25% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      Mostly near predicted monthly values.
   Northern Australian Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
   Southern Australian and New Zealand Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   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 (19 MAY - 21 MAY)
Date   T index  Conditions       MUFs                              
19 May    85    Fair             Near to 15% above predicted 
                                 monthly values
20 May    60    Normal-fair      Near predicted monthly values    
21 May    65    Normal           Near predicted monthly values   

COMMENT: IPS Preliminary HF Communications Warning 11 was issued 
on 18 May and is current for 20-21 May. IPS SWF HF Communications 
Warning 12 was issued on 18 May and is current for 18-19 May. 
Mostly normal ionospheric support observed over the AUS/NZ region 
for the last 24 hours. MUFs expected to be mostly near predicted 
monthly values during the day 19-May, with a chance of depressed 
periods for Southern AUS/NZ regions overnight 19-May. HF conditions 
degraded overnight 19-May and more widespread MUF depressions 
expected from 20-May due to increased geomagnetic activity. Short 
wave fadeouts possible with a chance of isolated M class flares.

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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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