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The quake occurred at 4:39 a.m., and was centered one mile east of The Geysers, four miles southwest of Cobb and five miles west northwest of Anderson Springs, at a depth of 2.5 miles, according to the US Geological Survey.
The survey received 13 shake reports from 10 zip codes, with reports coming from Middletown, Calistoga, St. Helena, Petaluma, Santa Rosa, Cloverdale, Healdsburg and Windsor.
A 3.3-magnitude quake was reported near The Geysers on June 1, as Lake County News has reported.
E-mail Elizabeth Larson at elarson@lakeconews.com . Follow Lake County News on Twitter at http://twitter.com/LakeCoNews and on Facebook at http://www.facebook.com/pages/Lake-County-News/143156775604?ref=mf .