Magnitude-5.1 earthquake hits Mexico near US border, days after magnitude-5.4 temblor

Eds: UPDATES with details on location, no damage or injuries reported, background.

CALEXICO, Calif. (AP) -- A magnitude-5.1 earthquake rocked the northern Baja California region of Mexico near the U.S. border on Monday, just days after the region was hit by a magnitude-5.4 temblor, authorities said.

Monday's quake was centered about 20 miles southeast of the border town of Mexicali at a depth of 4.3 miles, according to the U.S. Geological Survey. The epicenter was 23 miles south-southeast of the U.S. city of Calexico.

There were no immediate reports of damage or injuries on the U.S. side, according to the Imperial County Sheriff's Department and Calexico police.

The quake was felt in California in parts of San Diego, Imperial and Orange counties and as far away as Yuma, Ariz., about 50 miles from Calexico, according to the USGS.

Early Saturday, the Mexicali area was shaken by a magnitude-5.4 quake that shut down factories and knocked out electricity for 400,000 people.

------

On the Net:

U.S. Geological Survey: http://www.usgs.gov/