Preliminary estimates said a 4.7-magnitude temblor was centered near Malibu. The authorities were determining whether there was any significant damage.

LOS ANGELES - A preliminary magnitude 4.6 earthquake struck Southern California Thursday morning, according to the U.S. Geological Survey. The earthquake struck around 7:28 a.m. and was centered about 3.5 miles northwest of Malibu. It was about 6.5 miles deep.