THE GEYSERS (CBS SF) -- A 3.1-magnitude earthquake shook Sonoma County just after Monday afternoon, according to the U.S. Geological Survey.
The quake struck at 2:23 p.m. and was centered four miles northwest of the Geysers and 15 miles northeast of Healdsburg.
The USGS reported the temblor to have a depth of .88 miles.
The area of the Geysers stands as the largest single geothermal field in the world, according to the U.S. Department of Energy.
The region continually produces earthquakes between 0.5 and 3.0 on the Richter scale, related to deep-well injection that the Department of Energy said is necessary for the extended and sustained production of geothermal resources at the site.
COMPLETE QUAKE COVERAGE: CBS Earthquake Resource Center
Strong earthquakes with an epicenter off the coast can trigger tsunamis, depending on the size and type of the fault movement. The Pacific Tsunami Warning Center tracks earthquake data for the West Coast.
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