Update 8:20 p.m. Power has been restored in Pacifica. The Examiner reports some 10,000 people were affected by the outage that occurred after a 3.7 quake struck two miles southeast of that city. The temblor was felt all over the Bay Area.
Earlier posts
USGS has the details of the 3.4 earthquake that shook the Peninsula.
Update: 10-minute BART delay to the quake.
Update 3:38 p.m. Downed power lines and a power outage in Pacifica.