Android Earthquake Alerts System
A crowdsourced earthquake early warning system introduced by Google that is based on accelerometers in Android smartphones. It uses the collective sensing of a large number of devices to detect earthquakes and push alerts.
Timeline (last 90 days)
Since its launch in 2021, Google's Android Earthquake Alerts System has sent more than 1 billion alerts in total.
The coverage of the Android earthquake early warning system has expanded from the original 98 countries and regions to nearly 200 countries and regions worldwide.
The system relies on accelerometers built into Android phones to form a distributed sensor network, with each phone able to serve as a miniature seismometer.
When a phone is charging, locked and connected to Wi-Fi, it continuously collects accelerometer data for earthquake detection.
Through algorithms, the system compares abnormal vibrations reported simultaneously by multiple devices, rules out single-device false triggers (such as a phone being dropped or shaken by a person), and thereby infers that an earthquake has occurred and where its epicenter is.
The system can give users anywhere from a few seconds to tens of seconds of warning time before seismic waves reach farther areas.
In the destructive 2024 Venezuela earthquake, millions of people outside the epicenter received alerts before the shaking began.
Phone-based earthquake early warning may fail to trigger alerts in time in sparsely populated areas due to an insufficient number of active devices.
The system needs to be calibrated in cooperation with local seismic monitoring agencies; otherwise false alarms or missed alarms may occur.
Google emphasizes that the system is a supplement to, not a replacement for, official earthquake early warning networks.
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All Facts (11)
The prerequisite for users to get this feature is ensuring that the phone's system is updated to the latest version and that location services and alert notifications are enabled.
50%UnverifiedGoogle emphasizes that the system is a supplement to, not a replacement for, official earthquake early warning networks.
50%UnverifiedSince its launch in 2021, Google's Android Earthquake Alerts System has sent more than 1 billion alerts in total.
50%UnverifiedThe system relies on accelerometers built into Android phones to form a distributed sensor network, with each phone able to serve as a miniature seismometer.
50%UnverifiedWhen a phone is charging, locked and connected to Wi-Fi, it continuously collects accelerometer data for earthquake detection.
50%UnverifiedThrough algorithms, the system compares abnormal vibrations reported simultaneously by multiple devices, rules out single-device false triggers (such as a phone being dropped or shaken by a person), and thereby infers that an earthquake has occurred and where its epicenter is.
50%UnverifiedThe system can give users anywhere from a few seconds to tens of seconds of warning time before seismic waves reach farther areas.
50%UnverifiedPhone-based earthquake early warning may fail to trigger alerts in time in sparsely populated areas due to an insufficient number of active devices.
50%UnverifiedThe system needs to be calibrated in cooperation with local seismic monitoring agencies; otherwise false alarms or missed alarms may occur.
50%UnverifiedThe coverage of the Android earthquake early warning system has expanded from the original 98 countries and regions to nearly 200 countries and regions worldwide.
50%UnverifiedIn the destructive 2024 Venezuela earthquake, millions of people outside the epicenter received alerts before the shaking began.
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