[Ips-dhfpr] IPS Daily HF Prop Report - 01 May 13 issued 2330 UT on 01 May 2013

[Regional Warning Centre]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/01 MAY 2013 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (01 MAY) 
Date   T index  Conditions    
01 May   106    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 20% during local day.
      Enhanced by 25% during local night.
      Enhanced by 20% after local dawn.
   Niue Island Region:
      Enhanced by 25% during local day.
      Enhanced by 15% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
      Enhanced by 30% after local dawn.
   Southern Australian and New Zealand Region:
      Enhanced by 20% during local day.
      Enhanced by 20% during local night.
      Depressed by 20% after local dawn.
   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 (02 MAY - 04 MAY)
Date   T index  Conditions       MUFs                              
02 May    90    Fair-normal      About 10% above predicted monthly 
                                 values
03 May    80    Normal           Near predicted monthly values    
04 May    80    Normal           Near predicted monthly values   

COMMENT: A geomagnetic disturbance caused broad enhancements 
in the ionosphere and maximum available HF frequencies. The interplanetary 
magnetic field conditions that caused the disturbance are returning 
to normal approaching 00UT so the geomagnetic field and ionosphere 
will be recovering 2 May and should return to normal conditions 
3-4 May. Polar regions were most strongly affected. The very 
southern Australasian region had strong spread F conditions due 
to this magnetic disturbance.

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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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