http://www.newsweek.com/los-angeles-earthquake-app-tells-residents-brace-quake-will-be-revealed-1277765

A new mobile app in Los Angeles will allow residents to feel a vibration of their phones, or hear a tone, to alert them of an earthquake that’s about to happen where they're sitting, standing or laying.

Los Angeles Mayor Eric Garcetti and city officials on Thursday will unveil their new early-warning app — in conjunction with the U.S. Geological Survey’s earthquake early warning system — to help alert Southern Californians to take shelter in case nature strikes once again in an area prone to the next big quake.