Android Earthquake Alert: 2.5 Billion Users Warned of Quakes with Phone Sensors
July 18, 2025
In a 2023 event in the Philippines, users received alerts about six seconds after seismic detection, providing up to 15 seconds of warning before shaking.
Currently, AEA is available in 98 countries, reaching approximately 2.5 billion people and sending around 60 alerts each month, showcasing the potential of smartphone-based disaster response.
The system distinguishes real earthquakes from other vibrations by analyzing motion patterns across multiple phones in the same area.
Alerts are categorized into two levels: 'be aware' for those farther from the epicenter and 'take action' for those closer, with distinct sounds and messages, even during do-not-disturb modes.
Android Earthquake Alert (AEA) is a system that uses the accelerometers in Android phones to provide early warnings for earthquakes, giving users up to two minutes to reach safety.
Google's AEA model predicts earthquake location and strength by analyzing accelerometer data and seismic wave patterns from smartphones.
Since its launch, the system has only had three false positives, mainly caused by non-seismic vibrations like thunderstorms, leading to ongoing improvements.
As of March 2024, AEA has issued over 1,200 alerts for earthquakes ranging from magnitude 1.9 to 7.8, with accuracy enhanced through software updates.
Launched in the U.S. in 2020 and expanded internationally, AEA is enabled by default on most Android devices, ensuring widespread earthquake monitoring.
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Ars Technica • Jul 17, 2025
How Android phones became an earthquake warning system