MENLO PARK (CBS SF) — The U.S. Geological Survey reported a 3.9-magnitude earthquake Sunday morning at The Geysers on the border between Sonoma and Lake counties.
The tremor was recorded at 10:41 a.m. about 70 miles north of San Francisco at an estimated depth of 2.5 miles, according to the USGS.READ MORE: Alameda DA Charges Three With Fraud in Workers' Compensation Scheme
The geothermal field where the quake struck is one of the most seismically active in Northern California. There were no immediate reports of damage.
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Strong earthquakes with an epicenter off the coast can trigger tsunamis, depending on the size and type of the fault movement. The Pacific Tsunami Warning Center tracks earthquake data for the West Coast.
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