Your smartphone can already warn you about earthquakes. UC Berkeley, however, is going one step further: it wants your phone to help detect those quakes. The school has released an Android app, MyShake, that uses your phone's motion sensors to detect the telltale signs of tremors and combine that with the data from every other user. For all intents and purposes, you become part of a crowdsourced seismic station network -- you can confirm a quake just by leaving your phone turned on. That could be a big help when there aren't enough fixed stations to trigger an alert through conventional apps.