The Earthquake warning system works through the fact that the signal travels faster than the ground waves. So, earthquake occurs and is detected. A warning is s

The Earthquake warning system works through the fact that the signal travels faster than the ground waves. So, earthquake occurs and is detected. A warning is sent out. The amount of time between the warning and when you feel shaking is entirely dependent on how far you are from the epicentre. It won't give you much time, but it should be enough to get under a table, or to move away from windows that could break or things that could fall on you.