We can receive some earthquake warning by mobile phone

Today, many of our most reliable clues come from long-term forecasting,related to when and where earthquakes have previously occurred.At the scale of millennia,this allows us to make predictions about when highly active faults,like the San Andreas,are overdue for a massive earthquake.But due to the many variables involved,this method can only predict very loose timeframes.To predict more imminent events,researchers have investigated the vibrations Earth elicits before a quake.Geologists have long used seismometers to track and map these tiny shifts in the earth’s crust.And today, most smartphones are also capable of recording primary seismic waves.With a network of phones around the globe,scientists could potentially crowdsource a rich,detailed warning system that alerts people to incoming quakes.