Many laptops these days are built with accelerometers that are designed to protect your hard drive from damage. The accelerometer detects sudden movement and can switch the hard drive off so that the heads don't crash on the platters.
The Quake-Catcher Network realised that they could create the world’s largest and densest earthquake monitoring system simply by using the data from accelerometers in the world's laptop computers. The Quake-Catcher Network links participating laptops into a single coordinated network that can detect and analyze earthquakes faster and better than ever before.
QCN uses Google Maps to show the data collected from participating laptops and from participating desktop computers with USB sensors. The map also shows the latest USGS reported earthquakes.
Quake-Catcher Network
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