(CBS SF) — The U.S. Geological Survey says two magnitude 4.0-plus earthquakes have struck the San Andreas fault on the California-Mexico border.
The first one, a magnitude 4.2, struck at 12:30 p.m. PDT 7 miles southwest of Delta, B.C., Mexico at a depth of 16.1 miles.
The second quake, measuring in at a magnitude of 4.5, struck the same area about three minutes later, but only at a depth of .44 miles. Quakes just below the earth’s surface, in the 0 to 10 miles range, can cause even more damage at lower magnitudes.
Several people reported feeling the quakes in Mexicali, Mexico and Calexico in California.
There were no immediate reports of damage.
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Strong earthquakes with an epicenter off the coast can trigger tsunamis, depending on the size and type of the fault movement. The Pacific Tsunami Warning Center tracks earthquake data for the West Coast.
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