The quake occurred about 9:30 p.m. Thursday about 58 miles east-southeast of Ensenada, Mexico, and 257 miles west southwest of Phoenix, Ariz., at a depth of about 9 miles, the U.S. Geological Survey reported Friday.
Numerous residents of San Diego County along California's southern border with Mexico reported feeling the temblor, U-T San Diego reported.
The reports ranged from Chula Vista in the southwest corner of the county to the coastal city of Carlsbad in the northwest.
There were no immediate reports of injury or damage.
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