Southern California typically experiences more than 10,000 earthquakes per year, according to the United States Geological Survey. Most of those aren't powerful enough to be felt in a large radius, unlike today's 5.

A magnitude 5.2 earthquake that shook Monday morning in Southern California was followed by multiple other aftershocks, according to the U.S. Geological Survey.

An earthquake that shook Southern California today was centered near the community of Julian, about 45 miles northeast of San Diego. Shaking was also felt in the Los Angeles area.