Don't Let Earthquakes Catch you Offguard


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Earthquake Warning California

Earthquake Warning California is the country’s first publicly available, statewide warning system that could give California residents crucial seconds to take cover before you feel shaking. Managed by the Governor’s Office of Emergency Services (Cal OES), Earthquake Warning California uses ground motion sensors from across the state to detect earthquakes before humans can feel them and can notify Californians to “Drop, Cover and Hold On” in advance of an earthquake. 


To receive earthquake warnings, individuals and family members can download the MyShake App and ensure phone settings are adjusted to receive emergency alerts, including:


  • MyShake App: Free smartphone app that provides iPhone and Android users with audio and visual warnings [magnitude 4.5 or higher and Modified Mercalli Intensity III (weak) shaking]. Available at in the Apple App and Google Play stores;
  • Android Earthquake Alerts: Android phones with updated operating systems are automatically subscribed to Android Earthquake Alerts, which uses the same technology as the MyShake App; and
  • Wireless Emergency Alerts (WEAs): No-cost text messages for emergency situations [magnitude 5.0 or higher and Modified Mercalli Intensity IV (light) shaking].

If you live in or travel to areas that could be impacted by an earthquake, preparation is vital, as these events can strike suddenly, at any time, with little warning. Visit My Hazards to see if you live or work in an area prone to earthquakes.

Now available in California, Oregon and Washington!

The MyShake app now works along the entire US West Coast, so you can receive earthquake warnings on your Apple or Android phone, even when you're working, living, or traveling out of state.

Learn more about earthquake
and tsunami preparedness in:
California | Oregon | Washington

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Get Prepared

Earthquake Preparation Resources for residents, businesses, educators, and more.

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Get Alerts

Get alerted in a lot of different ways. Learn about WEAs, Android Earthquake Alerts, and our mobile app – MyShake.

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How it Works

Details on the science, technology, and systems used by Earthquake Warning California.

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News & Press

All the latest news, articles, videos, and other info about Earthquake Warning California. Also, resources for press and media.

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Answers to the most commonly asked questions about Earthquake Warning California.

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