Twitter came alive Sunday morning in the San Francisco area as people woke up to their beds shaking.
The U.S. Geological Survey says a 6.0-magnitude earthquake hit north of San Francisco at a depth of about 11 km. This happened at about 6:30 a.m. ET (3:30 a.m. local time).
There has been significant damage in the downtown area of Napa. A local councilman says that several buildings have been damaged, with stone, brick and glass crumbling to the sidewalks below.
Most photos posted to Twitter, though, show kitchen cabinets thrown open and dishes shattered on the floor.
Local police report that there are some power outages.
Here's what people in the area had to say on Twitter: