![Generic earthquake quake temblor](https://media.nbcbayarea.com/2019/09/quake16-e1647022322323.jpg?quality=85&strip=all&resize=320%2C180)
A preliminary 3.6 magnitude earthquake struck just north of Napa early Monday, according to the United States Geological Survey.
The quake, centered about 8 miles east of Angwin, struck at 6:38 a.m., the USGS said.
No other information was immediately available. Updates to come.
Are you prepared for the next big one?