[ImJustAnotherOkie]

I’d be willing to bet, like 95% of the phone apps, it promises far more than it delivers. Probably uses gps and monitors USGS website data. Hardly detecting, just pinging your battery away.

[jimtorr]

The App sends gps data to a server, which uses a magic formula to detect large ground movement before it occurs?

I won’t go to la times to find more....I don’t give them hits....

[InterceptPoint]

Not for me. I'm waiting for the Gravity Wave Detection Crowd Source App. Now that would be something.

[JoeFromSidney]

It's probably based on the accelerometer in your phone. That's the thing that tells how the phone is tilted. When the accelerometer detects an earthquake shake, it calls up the central location and reports the 'quake.

[KarlInOhio]

Flash mob quake: everyone in Los Angeles shake your phones and freak out the USGS.

[soycd]

Don’t let it mistake that butt dialed Burrito gas attack.

[minnesota_bound]

When you are being thrown about and see buildings and bridges falling down, you really do not need an app for that. You are the app.

[uglybiker]

Detect? feh!
I use sheep's bladders to prevent earthquakes!

[grey_whiskers]

Let me guess. It vibrates.