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I love this project and the idea of linking together the sensors on so many devices. I wonder if something similar could be used for earthquake detection using motion sensors in the phone, since many phone rest on flat surfaces at least part of the day (most of the day for me). It could be activated when phones are resting on a flat surface with no movement.

The Quake-Catcher Network (http://qcn.stanford.edu/) has been doing this for years with laptops and USB motion detection modules. They say that laptops are less than ideal because in larger earthquake laptops bounce around and give less accurate results. Mobile phones would suffer even more from this.

I used to have QCN on my laptop (old MacBook) and the sensors were quite sensitive, to the point where it could detect footsteps a couple of feet away.

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