The quake, which was reported at 5:26 a.m., occurred at a depth of 1.8 miles, according to the US Geological Survey.
Its epicenter was located two miles north of The Geysers, four miles west of Cobb and seven miles west northwest of Anderson Springs, the agency reported.
Shake reports were made to the US Geological Survey from seven zip codes, ranging from Calistoga to Fortuna and even to distant San Jacinto, 761 miles away.
A 3.7-magnitude earthquake occurred near The Geysers on March 28, as Lake County News has reported.
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