Thirty years ago, the Loma Prieta earthquake rocked California's Central Coast, leading to 63 deaths and more than 3,700 injuries throughout the region.
Officials don't know when or exactly where, but they do know California will have another significant earthquake. They agree that a key factor in everyone's safety is getting a warning as far in advance as possible -- even if it's only 15 seconds ahead of time.
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The state's new early earthquake warning system is being launched Thursday morning, and it gives Californians advanced warning in their pockets.
"The State of California, with the California Governor's Office of Emergency Services, has invested over tens of millions of dollars into the state's seismic network," said Ryan Arba of the CAL OES Seismic Hazards Branch.