The quake occurred at 5:57 a.m., according to the US Geological Survey.
The quake, which was recorded half a mile underground, was centered just northeast of The Geysers, five miles west southwest of Cobb and six miles west northwest of Anderson Springs.
The US Geological Survey received 16 shake reports from nine zip codes – including Clearlake, Lakeport, Middletown, Santa Rosa, Healdsburg, Cloverdale, San Rafael, Novato and Sacramento.
In the hour following the initial quake, four temblors measuring between 1.1 and 2.4 in magnitude occurred, based on seismic data.
The last time a moderate-sized earthquake was reported in the county was Nov. 15. It measured 3.0 in magnitude and occurred two miles north of The Geysers, as Lake County News has reported.
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