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. A 4.0 magnitude earthquake on the Richter scale is classified as "light," with "noticeable shaking of indoor items, rattling noises; significant damage unlikely."
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, 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.
Cinda Weisgerber posted on that she felt the earthquake in Ignacio at 5:35 a.m. Other Patch readers have left comments on neighboring sites as well.
Many Bay Area residents on Twitter said they were woken from a deep sleep by the shaking.