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Google tapped billions of mobile phones to detect quakes worldwide — and send alerts. Study reveals how the tech behemoth is using the motions sensors on phones to expand quake warnings to more countries.
Study reveals how the tech behemoth is using the motions sensors on phones to expand quake warnings to more countries.
Technology giant Google harnessed motion sensors on more than two billion mobile phones between 2021 and 2024 to detect earthquakes, and then sent automated warnings to millions of people in 98 countries. Owing to privacy concerns, sharing raw data from users’ phones is a challenge, they told Nature, but the Science paper is designed to shed as much light as possible on how the system works. In addition to mapping out data from individual users to identify earthquake origins and strength, the Google team developed algorithms to analyse the collected signals, which contain regional differences owing to geology and building construction, and account for how various phone models register motion.
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