Powerful April Quake Shifted Calif. City 31 Inches

(June 29) -- The 7.2-magnitude earthquake that struck Baja California and the southwestern U.S. in April didn't just rattle the region -- it shifted an entire California city, according to NASA radar images. The April 4 quake, the strongest to shake the region in more than a century, moved the border city of Calexico as much as 2.5 feet south and down into the earth.

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