Twin Quakes Jolt SF, Berkeley Small quakes hit hours after California holds annual drill By Rob Quinn, Newser Staff Posted Oct 21, 2011 1:29 AM CDT Updated Oct 21, 2011 3:00 AM CDT 3 comments Comments A reader board announces that trains will be halted for one minute at the Montgomery Street BART station Thursday morning. (AP Photo/Eric Risberg) (Newser) – Two earthquakes shook the San Francisco Bay Area yesterday, the same day that California held its annual earthquake preparedness drill and nearly 22 years to the day after a quake killed 63 people in northern California. A 4.0-magnitude quake hit the Bay Area, centered near Berkeley, at 2:30 in the afternoon, and a 3.8-magnitude temblor followed some six hours later, AP reports. No damage or injuries were reported from either quake. The stronger quake was a "sharp little earthquake" that had a "very nice impulsive character," a United States Geological Survey seismologist says.