COBB, Calif. – Two moderate-sized earthquakes hit the Cobb area within a minute of each other early Sunday evening.
The quakes, which occurred at 5 p.m. and 5:01 p.m., measured 3.1 and 3.9, respectively, according to the US Geological Survey.
The 3.1-magnitude quake was recorded at a depth of just under two miles, and was centered two miles north northeast of The Geysers geothermal steamfield, four miles west southwest of Cobb and six miles west northwest of Anderson Springs, the survey reported.
By 9 p.m. Sunday four shake reports from three zip codes – Calistoga, Cloverdale and Rohnert Park – had been submitted to the survey.
The second, 3.9-magnitude quake happened just under the earth’s surface. The US Geological Survey said the second quake’s epicenter was three miles north northeast of The Geysers, four miles west of Cobb and seven miles northwest of Anderson Springs.
The survey by 9 p.m. Sunday had received 29 shake reports from 15 zip codes, most of them in Lake, Napa and Sonoma counties, but some coming in from as far away as San Francisco.
Numerous Lake County residents posted on Lake County News’ Facebook page that they felt the second quake – dubbed by one “a good little shaker” – even as far down as the Kelseyville/Lakeport area.
One area resident said it was the largest quake he’s felt in Cobb so far, another person said they noted cars shaking as a result.
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