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L.A. at risk


LOS ANGELES—A study by NASA and university researchers finds there’s a 99.9 percent probability of a magnitude 5.0 or greater earthquake within three years in an area of greater Los Angeles, where a moderate temblor occurred last year.

The recent study is based on measurements of how the Earth’s crust was deformed by a magnitude-5.1 quake on March 28, 2014 in La Habra, Calif., southeast of downtown L.A.

The U.S. Geological Survey has done its own analysis and pegs the probability at 85 percent.

In the NASA study, scientists calculated how much strain may remain locked in faults, and they estimated a potential for a quake up to magnitude 6.3.

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