The tsunami caused by the energy that formed by underwater landslides, volcanic eruptions of the water. Ocean earthquake ground motion caused by plate tectonics enormous release of energy out on the water this energy to the surface. Then push the water rises higher. Above sea than normal gravity pulls the water. The energy of the water out into the landscape, this is the origin of the tsunami. Threat moving fast 500 km / h when the tsunami away LTD coast. It's hard to Property Gangut tsunami. Because moving throughout the depth of the water. But when the tsunami came in shallow water. It was the so-called The results of the shallow sea floor. Because there is an appropriate amount of water. Enormous power that has been so compressed. The drawings reduced wave Measuring a height of up to 100 feet, the tsunami waves from the port of Japan. Derived from the fact that Tsunami often appears dry out. Then when it approaches the coast. If the tsunami reached the coast before. The coastal waters are receding farther than normal. Before the wave hit the coast, which is very dangerous from a misunderstanding. The tsunami destroyed not only the coast, but also to a depth of 1 mile in particular.