Aurora Watch / G1 Geomagnetic Storm
A incoming CME shock swept past our planet at 03:25 UTC. A geomagnetic sudden impulse of 31 nT was detected by the Boulder, Colorado magnetometer. The ACE Spacecraft did show a solar wind increase to near 400 km/s. Only minor geomagnetic activity resulted at very high latitudes.
Update: A Minor Geomagnetic Storm (Kp=5) is now in progress at high latitudes. This is due to a south tilting component of the Interplanetary Magnetic Field combined with an elevated solar wind speed. Be on the lookout for Aurora if it is dark outside.
More info at http://ping.fm/FMSAU
From: http://ping.fm/iMek3/2012/04/todays-solar-flare-activity-april-23.html
