THE GEYSERS – A 3.3-magnitude earthquake was reported early Sunday morning at The Geysers geothermal steamfield.

The quake, originally reported at a magnitude of 3.1, occurred at 2:07 a.m., according to the US Geological Survey.

It was centered immediately at The Geysers, five miles southwest of Cobb and six miles west of Anderson Springs, at a depth of 2.1 miles, the agency reported.

The US Geological Survey received 11 shake reports from nine zip codes, including Kelseyville, Middletown, Windsor, Healdsburg, Cloverdale, Napa, Union City, San Francisco and South San Francisco.

A 3.2-magnitude temblor was reported at The Geysers on June 22, as Lake County News has reported.

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