Google has for years been harnessing the power of its Android smartphones to detect and measure tens of thousands of earthquakes. In a new paper published in the journal Science, researchers from the search giant described how they used motion sensors from its two billion-strong network of phones running Android between the years 2021 and 2024 to detect and alert quakes to users in almost 100 countries around the world. Known as "Android Earthquake Alerts" (AEA), this early warning system has uses the smartphones' accelerometers to detect telltale vibrations as they happen and inform residents of quakes in their areas....