A shallow magnitude 5.7 earthquake struck beneath the Pacific Ocean off the Northern California coast Friday afternoon, according to the U.S. Geological Survey. No tsunami warnings were issued for the coast, according to the National Weather Service. Within 20 seconds of the larger quake, the USGS reported on its website a 5.6 magnitude temblor that was closer to the California coast, but deleted it later. A 6.9 earthquake struck the same area in 2014, and a 6.5 quake hit last December. 3 p.m.: Updated with background about North Coast quake zone.

Source: Los Angeles Times September 22, 2017 21:20 UTC