4.1-magnitude earthquake hits 9 miles north of Napa

A 4.1-magnitude earthquake struck nine miles north of Napa Thursday, May 21, 2015. (U.S. Geological Survey)

An earthquake with a preliminary magnitude of 4.1 hit 9 miles north of Napa Thursday night, according to the U.S. Geological Survey.

The quake struck at 7:53 p.m. and had a depth of about 5.5 miles.

There were no immediate reports of damage or injuries.

In August, a magnitude-6.0 temblor caused extensive damage in Napa and the surrounding area.
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