COBB, Calif. – A 3.9-magnitude earthquake struck The Geysers area on Cobb Tuesday morning.

The US Geological Survey said the quake occurred at 10:43 a.m.

Its epicenter was located one mile north northwest of The Geysers geothermal steamfield, five miles west southwest of Cobb and seven miles west northwest of Anderson Springs, the survey reported.

Survey data showed the quake was recorded at a depth of 2.2 miles.

The US Geological Survey received a dozen shake reports, including reports from Kelseyville, Lakeport and Middletown, several from areas of Sonoma County such as Cloverdale and Santa Rosa, and one from San Francisco.

A 3.4-magnitude quake occurred two miles north northeast of The Geysers on April 23, as Lake County News has reported.

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