More than 600 earthquakes have shaken the California-Mexico border since Saturday

More than 600 small earthquakes have been recorded this weekend in a rural area near the Salton Sea in Southern California, with the largest having a magnitude of 5.3, a US Geological Survey geophysicist told CNN.

More than 600 small earthquakes have been recorded this weekend in a rural area near the Salton Sea in Southern California, with the largest having a magnitude of 5.3, a US Geological Survey geophysicist told CNN.