Here’s How to Stay Safe Before, During, and After an Earthquake Strikes

Portuguese firefighters from Cascais Municipality rescue "victims" trapped inside cars during a CASCADE-19 EU civil protection exercise simulated earthquake related event staged at an abandoned building in Alcabideche, Portugal on May 31, 2019. Horacio Villalobos, Corbis/Corbis via Getty Images

A 6.4-magnitude earthquake struck Southern California on Thursday, triggering a state of emergency in the desert town of Ridgecrest, and leaving people from Los Angeles to Las Vegas feeling shaken.

It’s the largest temblor to strike the region in 20 years, officials said.