The quake occurred at 1:14 p.m. two miles north of The Geysers, four miles west of Cobb and seven miles west northwest of Anderson Springs, according to the US Geological Survey.
The US Geological Survey said the event had not yet been reviewed by a geologist, so the magnitude may later be adjusted upon review.
Seven shake reports from six zip codes – Kelseyville, Middletown Healdsburg, Modesto, San Francisco and Roseburg, Ore. – were submitted to the US Geological Survey.
The last earthquake measuring 3.0 in magnitude or above in The Geysers area occurred on Aug. 17. On that date a 3.5-magnitude earthquake was reported three miles east of The Geysers, the US Geological Survey reported.
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