BLACK OAKS, Calif. (KGO) -- The USGS reports a magnitude 3.9 earthquake that struck near The Geysers in Sonoma County Saturday morning.
The quake was reported about four miles northwest of The Geysers.
More than a dozen people reported feeling the shaking.
No damage or injuries were immediately reported.
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Magnitude 3.9 earthquake shakes northern Sonoma County
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