Hundreds of quakes shook San Diego

 "A swarm" of several hundred earthquakes, the strongest measuring a 5.5 magnitude, were centered east of San Diego near California's border with Mexico on Sunday afternoon but caused little damage, seismologists said.

Sunday's shaking in Southern California's Imperial Valley was the most activity recorded there since the 1970s, according to U.S. Geological Survey seismologist Lucy Jones.

"We are having a swarm," Jones said. "We expect thousands of events (like this) over several days."

In Brawley, the town closest to the center of the swarm, a Fire Department dispatcher said there were no reports of injuries so far. Brawley is about 100 miles east of San Diego and about 200 miles southeast of Los Angeles.hundreds of 

Earthquake in Southern California

Los Angeles (CNN) -- A magnitude 3.8 earthquake in southern California struck San Bernardino County near the San Andreas Fault Saturday morning, but no major damage was reported, authorities said.

The quake's epicenter was two miles northwest of Devore, California, where residents told CNN affiliate KCAL that their homes shook, without damage, authorities said.

"It's not on the San Andreas fault. It's located very close to it," seismologist Lucy Jones of the U.S. Geological Survey told KCAL.