[CQ-Contest] Solar Wind Speed Shock detected - Geo-Storm in 12 hours : Update 0716 UTC 17-I-2005

[NW7US, Tomas]

In addition to the Energetic Ion Enhancement Event of 0640 UTC 17-I-2005  
(see my last update), a moderate shock has been detected in the solar wind  
speed at 0716 UTC, 17-I-2005.  The plasma density change was 3.4 part/cc,  
with an increase in speed of 78 km/s, and a temperature increase of  
171,851.9 degrees K.  The Bz went from -0.3 to -1.2 at the same moment.   
This is a precursor to the beginning of geomagnetic storminess within 12  
hours.

73 de Tomas, NW7US (AAR0JA/AAA0WA)

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