Nearly two dozens earthquakes, including a magnitude 5.7 temblor, struck Monday night near the U.S.-Mexican border in southern San Diego County.
The largest of the quakes was recorded at 9:26 p.m. and was felt by residents across a wide swath of Southern California, including Los Angeles.
The temblor was centered five miles southeast of Ocotillo in San Diego County and 16 miles east-northeast of Jacumba in eastern San Diego County, the U.S. Geological Survey said.
The others -- ranging from 3.2 to 4.1 magnitude -- were also concentrated in the same general area, according to the survey agency.
There were no immediate reports of damage.