Phones Alerted Millions Before Quakes Shook Venezuela

8 hours ago

Google's Earthquake Alerts system provided early warnings to millions in Venezuela via Android phones, despite the country lacking a national system.
The system uses accelerometers in phones to detect P-waves, processes data centrally, and sends alerts for quakes of magnitude 4.5+, with severity levels based on shaking intensity.
In the Venezuela quakes, alerts reached 11.4 million people, with 1.4 million receiving 'Take Action' warnings; alerts can offer seconds to minutes of advance notice, but timeliness varies by distance from the epicenter.
Google's system, active in nearly 100 countries since 2021, continuously updates quake parameters and treated overlapping seismic waves from two back-to-back major quakes as a single event.
While early warnings may improve preparedness, their life-saving impact in Venezuela is still uncertain, but they provide critical time for protective actions like 'drop, cover, and hold on'.

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