Small quake jolts San Francisco Bay area
A small earthquake hit the San Francisco area, causing a sharp jolt but no damage or injuries.
The U.S. Geological Survey says the earthquake a preliminary 4.0 magnitude and was centered two miles southeast of Berkeley at 2:31 p.m.
The quake came on the same day Californians took part in an annual earthquake preparedness drill at 10:20 a.m. Thursday. More than 8 1/2 million people signed up to participate in the 2011 Great California ShakeOut.
It also came almost 22 years to the day after the Loma Prieta earthquake struck the Bay Area during the 1989 World Series.
Officials at Bay Area Rapid Transit said the system's trains were delayed about 15 minutes as workers inspected tracks. Officials at Caltrain said none of their trains were being delayed.
