World's first pre-quake alert system set up in Japan

The Japan Meteorological Agency began operating the world's first system to give pre-earthquake warnings to the public.
The system is designed to detect earthquakes by sensing small seismic waves that precede big quakes and give warnings a few seconds before a major quake hits to regions expected to suffer damage.Warnings would be aired through a public television station, NHK, and private stations as well as radio stations, the agency said.The service is only available in Japan