It struck near Angwin in Napa County, according to the United States Geological Survey. NAPA COUNTY, Calif. (KGO) -- A preliminary 3.6 magnitude earthquake rattled the North Bay early Thursday morning. RELATED: Prepare NorCal: Disaster Preparedness Resources The quake hit at 12:36 a.m. and was centered 7.6 miles east-southeast of Angwin, 17.5 miles north of Napa and 19.4 miles north-northeast of Sonoma, the USGS said. So far, there are no reports of injuries or damage.
