The 2000 Yountville earthquake occurred with a moment magnitude of 5 on a previously unmapped fault, about 3 miles (4.8 km) south southwest of Yountville, California in the Mayacamas Mountain Range under Mount Veeder and about 9 miles (14 km) south northwest of Napa, California.

[2] The earthquake occurred at a depth of 9.4 km on a northwest-oriented fault and with a right-lateral strike-slip motion.

[4][5] Several unreinforced masonry buildings in downtown Napa suffered exterior damage as a result of the earthquake.

[6] Although the magnitude of the primary event was considered moderate, shaking was intensified in the city of Napa and surrounding area due to the sedimentary soil on the floor of the valley.

[7] The earthquake caused an interruption of power to approximately 10,000 Pacific Gas and Electric Company customers.