The San Ramon Valley was shaken by a small earthquake late Saturday afternoon.
The U.S. Geological Survey reported that the magnitude 2.9 earthquake was centered 3.1 miles north-northeast of Diablo, near Danville. The quake struck at 4:27 p.m.
The quake was felt in Danville, Diablo, San Ramon, Alamo and Walnut Creek.
There are no reports of damage or injuries.