Series of quakes shake area near geothermal field in Northern California

A magnitude 4.2 earthquake struck about 3 miles northwest of the Geysers geothermal field Wednesday evening and was followed by a series of aftershocks, the U.S. Geological Survey said.

The quakes were reported between 7:58 and 9:04 p.m., according to the USGS. The first was followed by several aftershocks with magnitudes of 4.0, 2.7, 2.7, 2.5 and 2.6.

Via LA Times