[Ips-dhfpr] IPS Daily HF Prop Report - 12 July 12 issued 2346 UT on 12 Jul 2012

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/12 JULY 2012 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (12 JULY) 
Date   T index  Conditions    
12 Jul    77    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  X1.4    1653UT  probable   all    South American/
                                    Atlantic

MUFs:
   Cocos Island Region:
      Enhanced by 20% at times during local day.
      Depressed by 25% during local night and after
      local dawn.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values to enhanced 20%
      during local day.
      Depressed by 30% during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
      Hobart spread-F 10-12 and 16-21UT. Sporadic-E
      12-15UT. Perth mild spread-F local dawn. 
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Generally weak ionospheric support over the UT day.

PCA Event : No event.

Predicted Monthly T index for July:  77


2. FORECAST (13 JULY - 15 JULY)
Date   T index  Conditions       MUFs                              
13 Jul    70    Normal           Near predicted monthly values
14 Jul    65    Normal           Near predicted monthly values    
15 Jul    60    Normal           Near predicted monthly values/depressed 
                                 10-30%.   

COMMENT: Propagation conditions mostly normal Equatorial/Aus 
regions with mild night-time MUF depressions. Continuing poor 
ionospheric support Antarctic region. Chance of isolated short-wave 
fadeout events. Possible significant disturbance days two and 
three due to CME impact from the X-class flare observed late 
on Jul 12. Analysis of this event is ongoing.

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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.

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