ShakeAlert early warning system simulation of a repeat of the Lomo Prieta earthquake is displayed on the computer of Richard Allen (not shown), UC Berkeley Seismological Laboratory director, after he spoke during a press conference on BART's earthquake pr

ShakeAlert early warning system simulation of a repeat of the Lomo Prieta earthquake is displayed on the computer of Richard Allen (not shown), UC Berkeley Seismological Laboratory director, after he spoke during a press conference on BART's earthquake preparedness at the Embarcadero BART station on Monday, August 25, 2014 in San Francisco, Calif. (Photo By Lea Suzuki/The San Francisco Chronicle via Getty Images)