Two Earthquakes Hit Off SF Coast

Three small earthquakes struck near the San Francisco Zoo on Saturday afternoon, and the largest was later revised to magnitude 2.9. (abc7news.com) (eastbaytimes.com) The first quake hit at 4:39 p.m. Saturday, with its epicenter about two miles south-southwest of the zoo, according to the U.S. Geological Survey. (abc7news.com) (eastbaytimes.com) Two more shocks followed almost immediately: a magnitude 2.0 at 4:40 p.m. and a magnitude 2.7 at 4:41 p.m. ABC7 reported all three occurred offshore near Daly City. (abc7news.com) People in San Francisco, San Mateo and Alameda counties reported feeling the shaking, and about 1,000 residents filed reports through the U.S. Geological Survey’s “Did You Feel It?” system. (eastbaytimes.com) (usgs.gov) The quakes were shallow, with the first measured at about 4.3 miles deep. The U.S. Geological Survey says people typically notice earthquakes larger than about magnitude 2.5. (abc7news.com) No injuries or major damage were reported after the shaking. (abc7news.com) The Bay Area’s larger earthquake risk has not changed: the U.S. Geological Survey’s long-range forecast puts the chance of at least one magnitude 6.7 or larger quake in the region at 72% before 2043. (usgs.gov) Saturday’s cluster was minor, but it landed in one of the country’s most closely watched seismic regions, where even small offshore jolts are widely felt and quickly logged. (usgs.gov 1) (usgs.gov 2)