Millions of residents, students and office workers across the state will “drop, cover and hold on” Thursday morning as part of the 17th annual Great California ShakeOut drill aimed at promoting earthquake preparedness.

The one-minute drill, which is designed to simulate the response to a massive 7.8-magnitude earthquake on the southern San Andreas fault, was developed to teach people what to do when a large temblor strikes and ways to prepare for such a disaster.

ALSO SEE: Shaken, not unprepared: Earthquake simulator visits CSUF ahead of Great California ShakeOut 2025

When the drill begins at 10:16 a.m., millions of people who have the MyShake app on their phones will get an alert saying the system is being tested.

“It’s not a matter of if an earthquake of this size will happen — b

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