Japan has the most sophisticated earthquake detection network in the world — a system of 4,235 seismometers can detect the very first waves from a quake, before estimating its focus, magnitude and seismic intensity.
Phone alerts are then sent out, giving people precious seconds to prepare...
TOKYO — A strong earthquake jolted on Sunday the same area of northeastern Japan that was hit by a massive quake in March, but there was no sign of further damage along the coast or to the crippled Fukushima nuclear power plant, officials said
Some say it's an aftershock from the original...