PIEDMONT, Calif. -- A 3.5 preliminary magnitude earthquake has struck Piedmont, according to the USGS. The earthquake struck at 6:11 a.m. and had a depth of 7 miles. There are no immediate reports of damage.
RELATED: Bay Area Earthquake Tracker
BART is reporting delays as crews inspect the tracks.
Yesterday, a 3.4 magnitude earthquake struck in Piedmont followed by 2.0 and 1.9 magnitude aftershocks.
See more stories, photos and video on earthquakes.