SAN FRANCISCO (KRON) — A 4.2-magnitude earthquake shook the Bay Area Monday morning at 7:01 a.m., according to the U.S. Geological Survey. The quake was the largest in a swarm that began with a 3.9-magnitude earthquake at 6:27 a.m. The epicenters are 2.6 miles southeast of San Ramon. Thousands of people reported feeling light to […]