Understanding Earthquakes: The Faults Below The Surface | NBC Southern California

Understanding Earthquakes: The Faults Below The Surface

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    Seismologists say the earthquake that shook Los Angeles early Monday morning was caused by an erupting fault about five miles below the Santa Monica mountains. Caltech is studying the many faults that run under California's ground. Conan Nolan reports from Pasadena for the NBC4 News at 5 p.m. on Monday, March, 17, 2014.