The entire West Coast is now covered by an earthquake early warning system

A crack in a California road caused by an earthquake.
(Image credit: Frederic J. Brown/AFP via Getty Images)

As of Tuesday morning, the U.S. earthquake early warning system can issue earthquake alerts to cellphone users in California, Oregon, and Washington.

Launched in Los Angeles in late 2018, the ShakeAlert early warning system aims to let people know about incoming shaking, so they can have at least a few seconds to find a safe spot to ride out the earthquake. The alert system is successful because communications systems are now faster than the speed of shaking waves moving through the ground, the Los Angeles Times reports.

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Catherine Garcia, The Week US

Catherine Garcia has worked as a senior writer at The Week since 2014. Her writing and reporting have appeared in Entertainment Weekly, The New York Times, Wirecutter, NBC News and "The Book of Jezebel," among others. She's a graduate of the University of Redlands and the Columbia University Graduate School of Journalism.