Catching quakes with laptops

Inside your laptop is a small accelerometer chip, there to protect the delicate moving parts of your hard disk from sudden jolts. It turns out that the same chip is a pretty good earthquake sensor, too -- especially if the signals from lots of them are compared, in order to filter out more mundane sources of laptop vibrations, such as typing.

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<p><a href="http://www.physorg.com/news144332122.html">Catching quakes with laptops</a></p> <p>Inside your laptop is a small accelerometer chip, there to protect the delicate moving parts of your hard disk from sudden jolts. It turns out that the same chip is a pretty good earthquake sensor, too -- especially if the signals from lots of them are compared, in order to filter out more mundane sources of laptop vibrations, such as typing.</p>