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Trio Of Earthquakes Rattles Sonoma, Napa Counties

The largest of the quakes centered near The Geysers was 3.3-magnitude, according to the U.S. Geological Survey.

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Over a 3-minute period starting at 4:59 p.m. Wednesday, a trio of earthquakes struck near The Geysers in northern Sonoma County.
Over a 3-minute period starting at 4:59 p.m. Wednesday, a trio of earthquakes struck near The Geysers in northern Sonoma County. (Kristin Borden/Patch)

NORTH BAY, CA — Three earthquakes measuring 3.3 and 3.2 rattled northern Sonoma County Wednesday evening, according to the U.S. Geological Survey.

The trio of quakes struck near The Geysers over a three-minute span at 5 p.m. and was accompanied by a swarm of several smaller jolts, the USGS reported.

The earthquakes were felt nearby in Healdsburg, Geyserville, Calistoga, Napa, St. Helena, Middletown and Kelseyville, and in the East Bay in Richmond, according to responses submitted to the USGS.

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At 9:30 p.m. Wednesday, a 2.2-magnitude quake near The Geysers was followed a minute later by a 2.1-magnitude.

There were no immediate reports of damage associated with the quakes.

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The USGS produced this Shake Map of a 3.3-magnitude earthquake that struck at 4:59 p.m. Wednesday some 4 miles from The Geysers, 5 miles from Cobb, 10 miles from Cloverdale and 25 miles from Santa Rosa. (U.S. Geological Survey)

Bay City News Service contributed to this report.

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