The CA swarm is at Geysers
Posted by JAC on 3/1/2011, 10:42 am
That is normal due to man-made geothermal activity.

Goes on almost continually, but usually no more the 3.x something.

Anything over 4 is unusual.

http://earthquake.usgs.gov/earthquakes/recenteqsus/Maps/US2/37.39.-123.-121.php
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Related Quakes and Fault Lines... question - BobbiStorm, 3/1/2011, 9:38 am
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