The quake occurred at 4:12 p.m., according to the US Geological Survey.
Its epicenter was three miles east of The Geysers, six miles southwest of Cobb and four miles west northwest of Anderson Springs at a depth of 1.4 miles, the agency reported.
The US Geological Survey received five shake reports from four zip codes – Middletown, Eureka, Vallejo and one from San Diego, 839 miles away.
A 2.9-magnitude earthquake was reported Tuesday at 6:26 p.m., also at a depth of 1.4 miles, two miles west of Anderson Springs, four miles east southeast of The Geysers, four miles south of Cobb, the survey reported.
Three shake reports were made to the US Geological Survey from two zip codes – Morgan Hill and Olivehurst.
A 3.4-magnitude earthquake occurred near Anderson Springs on Dec. 21, as Lake County News has reported.
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