Firemen stand in front of a collapsed house that crushed a car in San Francisco's Marina District after the Loma Prieta earthquake in October, 1989.
Imagine if California had an early warning system that gave everybody a few seconds to brace for impact before an earthquake. Japan has such a system, and when that massive quake hit in 2011, a sensor embedded in the ground sent out an alert that launched warnings across the country. State Senator Alex Padilla would love to see something similar in California, before the next Big One hits. Reporter: Molly Peterson