The quake hit at 9:55 a.m. and was centered about 11 miles southeast of Anza and 15 miles southwest of Palm Desert, according to the U.S. Geological Survey. The USGS originally reported the magnitude as 5.1. It then said there were three separate quakes ranging from 4.6 to 4.7 magnitude. Officials later told the Los Angeles Times that a single 4.7 magnitude quake was was followed by more than 50 aftershocks.
People called newsrooms around from Sequioa National Park in the north to Tijuana in the south. Dozens of people called the FOX 5 newsroom from around San Diego County to report feeling the quake.
There were no immediate reports of damage or injuries.