LOS ANGELES — More than 100 earthquakes rattled the California-Mexico border region after a magnitude 5.7 temblor struck Monday night.
Most of the quakes have been small, but more than two dozen registered magnitude 3.0 or above, and a few were more than magnitude 4.0.
Experts believe all the quakes are aftershocks from April's 7.2 Mexicali quake, which killed two people and caused more than $90 million in damage on the California side of the border.
Monday's 5.7 quake was felt over a wide swath of Southern California. Thousands of people reported to the U.S. Geological Survey that they felt that quake. Many of them lived in San Diego and Imperial counties, but there were also numerous reports from Orange County, Los Angeles, Redondo Beach, the Westside, the San Fernando Valley and the Inland Empire.
A 4.3 quake a short time later was also widely felt in the San Diego/Imperial County area.
All the quakes were centered about 30 miles west of El Centro and about 80 miles east of San Diego.
There were no injuries or significant damage reported in this quake swarm.