Earthquake swarm, including magnitude-5.3 quake, strikes Southern California: USGS

CALIPATRIA, Calif. -- A swarm of earthquakes -- one measuring a magnitude of 5.3 -- struck near the Salton Sea in Imperial County on Saturday morning, according to the U.S. Geological Survey.

The series of quakes began shortly before 11 a.m., with the magnitude-5.3 temblor occurring at 10:55 a.m. at a depth of 3 miles, the USGS said. The epicenter of that earthquake was located about 7 miles west of Calipatria and 25 miles north of El Centro, a city just north of the U.S.-Mexico border.
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A magnitude-4.3 quake was also among the several dozen recorded in the area Saturday morning, the Geological Survey said.
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There were no immediate reports of injuries or serious damage.