The magnitude-4.7 earthquake that rattled Southern California on Monday was the largest centered in the greater Los Angeles area since 2010, officials said.
"It's been three years since we had anything this size this close to Los Angeles," said Susan Hough, a seismologist with the U.S. Geological Survey. She cited a magnitude-5.4 quake that struck the desert area in July 2010. Since then, Southern California has experienced quakes larger than Monday's but they occurred closer to the U.S.-Mexico border.
Monday's quake was preceded by a small foreshock, which confused the survey's monitoring system into recording multiple shocks of various sizes. The temblor was centered a few miles northeast of the San Jacinto fault, Hough said.