Read, Watch or Listen

California's earthquake early warning system successfully alerted residents in several areas seconds before a magnitude 5.2 earthquake struck near Julian on Monday. Users reported receiving alerts on their phones before feeling shaking, providing crucial seconds of warning. The ShakeAlert system, operational in California, Oregon, and Washington, uses seismic sensors to detect quakes and issue alerts. Many praised the system's effectiveness on social media, highlighting the valuable seconds gained. The MyShake app, available on various devices, is one way to receive these alerts, along with built-in Android features and other apps. While some users felt anxiety initially, the system's benefits in preparedness are evident, particularly for stronger quakes.

Prepared by Olivia Bennett and reviewed by editorial team.