PASADENA, Calif.—Elizabeth Cochran was sitting in her office when her computer suddenly sounded an alarm.
Beep. Beep. Beep.
A map of California on her screen lit up with a red dot, signaling an earthquake had struck. A clock next to the map counted down the seconds until shock waves fanning out from the epicenter north of Los Angeles reached her location in Pasadena: 5-4-3-2-1.
Right on cue, Cochran felt her chair quiver ever so slightly from a magnitude-4.2 that rumbled through Southern California on Sept. 1.http://www.boston.com/news/science/articles/2011/09/20/us_scientists_testing_earthquake_early_warning/
Article courtesy of The Boston Globe by Alicia Chang-Associated Press Science Writer