A minor earthquake shook the East Bay early Sunday, prompting BART to bring trains to a stop for a few minutes to check for damage.
The U.S. Geological Survey initially recorded it as a 3.9 magnitude quake when it struck AT 8:49 a.m., but bumped it down to 3.7 minutes later.
Preliminary data shows the origin about nine miles below ground in Concord, with people reportedly feeling it in Oakland, Berkeley, Vallejo, and the eastern edge of San Francisco.
The shake came just two days after San Francisco woke up to a series of three small quakes.
The first one early Friday — another 3.7 magnitude — originated just off the coast by the S.F. Zoo (apparently around the epicenter of the devastating 1906 quake), and was followed later that morning by a couple below-3.0-magnitude aftershocks.
