A 4.0 magnitude earthquake centered in the East Bay shook the Bay Area early this morning, followed by a second magnitude 2.0 quake about 30 minutes later, according to the U.S. Geological Survey.
The first quake was reported at 5:33 a.m. one mile southeast of East Richmond Heights with a depth of about 5.5 miles.
A second quake was reported at 6:03 a.m. in around the same location.
BART stopped trains due to the first tremblor, and held trains at stations for 5 to 10 minutes to check the tracks for damage. Trains continue to have short delays this morning as the system gets back on track.
The quake was felt in San Francisco, in Berkeley and throughout the East Bay as far south as Hayward and as far east as Antioch and Concord, and even in peninsula cities like Redwood City.
Many Bay Area residents on Twitter said they were woken from a deep sleep by the shaking.