This article is about the physics involved in the tsunami that happened of the Chilean coast. The tsunami reached the coast of Hawaii in about 15 hour and japan in 22 hours. This tsunami started from an earthquake. The waves start from the epicenter and expand outwards. When the wave was at a depth of 7000 meters it was moving at a velocity of 943m/s. Physics played a key role in keeping people safe because they were able to calculate the time it would take for the tsunami to get to the shore so people would be able get to a safe distance before the wave hit.