How Android devices detect early quakes

Google has developed an early earthquake warning system that relies on smartphones running the Android operating system, utilizing the built-in motion sensors within the devices to detect vibrations caused by earthquakes. Launched in 2021, the system has achieved widespread success, detecting over 18,000 earthquakes over four years and sending hundreds of millions of alerts to millions of users in nearly 100 countries. The system provides warnings before strong tremors arrive, aiming to save lives by leveraging networks composed of billions of devices, without the need to build traditional monitoring stations.

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