2014 South Napa earthquake 2014 South Napa earthquake The 2014 South Napa earthquake occurred in the North San Francisco Bay Area on August 24 at . At 6.0 on the moment magnitude scale and with a maximum Mercalli intensity of VIII ("Severe"), the event was the largest in the San Francisco Bay Area since the 1989 Loma Prieta earthquake. The epicenter of the earthquake was located to the south of Napa and to the northwest of American Canyon on the West Napa Fault. Total damage in the southern Napa Valley and Vallejo areas was in the range of $362 million to 1 billion, with
California State Route 17 in Oakland, destroyed in the 1989 Loma Prieta earthquake) but parts have been redesignated. The section between Interstate 80 and US 101 in San Rafael was renumbered as an extension of Interstate 580. Prior to the redesignation, this part of SR 17 followed Richmond streets, including an expressway called Hoffman Boulevard, to the bridge; a freeway built to Interstate standards was completed in 1990 after the corridor became 580's northwestern leg. Additionally, SR 17 between Interstate 280 in San Jose and the freeway's new northern terminus in Oakland was re-designated as Interstate 880 later that year. Since the late 1990s,