Google has developed a global earthquake detection and early warning system that utilizes motion sensors in more than two billion Android smartphones worldwide. Operating between 2021 and 2024, this system detects seismic activity in real time and sends automated alerts to millions of people across 98 countries. A recent study published in Science highlights that the smartphone-based system's effectiveness rivals traditional seismic networks in delivering life-saving warnings. The Android Earthquake Alerts program leverages the widespread presence of mobile devices to provide preshake warnings, enhancing public safety during seismic events.