3.6 Earthquake Shakes Napa County Overnight

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ANGWIN, Napa County (CBS SF/BCN) -- A 3.6 magnitude earthquake rattled Napa County early Thursday morning.

The U.S. Geological Survey reported preliminary numbers for the quake, which hit at 12:36 a.m. and was centered 12 km (7.5 miles) east and south of Angwin and west of Lake Berryessa at a depth of 4.6 km (2.9 miles).

(U.S. Geological Survey)

People reported feeling the shaking as far away as San Jose and Stockton.

The quake was followed by a series of smaller earthquakes all measuring less than 2.

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