Magnitude 4.0 Quake Hits Bay Area

UPDATE 6:40 A.M.: 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 temblor, 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, throughout the East Bay as far south as Hayward and as far east as Antioch and Concord, and even in Peninsula cities including Redwood City.

Many Bay Area residents on Twitter said they were woken from a deep sleep by the shaking.

UPDATE 5:41 A.M.: A 4.0-magnitude earthquake rocked the Bay Area this morning, according to the U.S. Geological Survey.

The quake was recorded approximately 1 mile from El Cerrito at 5:33 a.m., according to the USGS.

The temblor had a depth of about 5.5 miles.

Bay City News contributed to this report.