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

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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