Moderate earthquake hits Napa County, California

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YOUNTVILLE, California (CNN) -- A moderate earthquake with a magnitude of 5.2 struck Napa County in Northern California early Sunday, according to the United States Geological Survey's Web site.

At 1:36 a.m. PDT, the quake hit about three miles southwest of Yountville and six miles northeast of Sonoma. The region is just north of the San Francisco-Oakland metropolitan area.

Napa Police Commander Steve Geoghegan said no significant damage was reported. Police and public works employees were checking for structural damage to bridges and dams. Some natural-gas leaks and water-main breaks, broken windows and other minor damage were reported.

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