The San Francisco Bay Area's strongest earthquake since Loma Prieta hit nearly 25 years ago struck the heart of California's wine industry early Sunday, igniting gas-fed fires, damaging some of the region's famed wineries and historic buildings, and sending more than 170 people to the hospital.
According to the U.S. Geological Survey, the magnitude-6.0 earthquake struck at 3:20 a.m. about three miles northwest of American Canyon.
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SOUTH NAPA EARTHQUAKE