SAN DIEGO (AP) - A magnitude-5.8 earthquake in northern Baja California has rattled the U.S.-Mexico border region and caused buildings to sway in San Diego, more than 100 miles away.
The U.S. Geological Survey says the quake was centered about 20 miles southeast of the Mexican border city of Mexicali, and was followed quickly by a 4.9 quake and other aftershocks.
Two smaller quakes preceded the main shock, which was initially reported at magnitude-5.9 before being downgraded slightly.
Busy phone circuits made it difficult to get information from authorities on either side of the border.
A USGS geophysicist says the area is seismically active and the temblor is "definitely nothing that's unusual."
The quake occurred 4.3 miles deep and is considered shallow. Shallower quakes have the potential to cause more damage than deeper ones.
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