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The accelerometer is the small device in laptops designed to detect movement. It senses when a machine has been dropped or knocked off a desk or dropped. Then, before impact, it pulls the heads on the hard drive clear of the platters where data is stored - helping prevent damage.
A group from Stanford University and the University of California-Riverside now use the technology to detect earthquakes as part of their Quakecatcher Network.
You can learn more about the accelerometer project here.


