Tsunamis are water waves by vertical changes in sea level suddenly. Changes in sea level can be caused by an earthquake centered under the sea, underwater volcanic eruptions, underwater landslides, or or a meteor hit the ocean. Of the three causes of tsunamis, earthquakes are the main cause. The size of the tsunami wave is determined by the characteristics of the earthquake that caused it.
The part that caused the tsunami is an earthquake that occurred on the seabed. Tsunami waves can move in any direction. Power contained in the tsunami wave is fixed to the function of his height and speed. When approaching the coast, the tsunami wave velocity decreases to about 30 km per hour, but its height was increased to reach tens of meters. Tsunami waves can go blow up to tens of kilometers from the beach.
Tsunami waves can go blow up to tens of kilometers from the beach. Damage and casualties that occur because of the Tsunami can be caused by a blow of water and materials carried by the flow of tsunami waves.
The negative impact caused by tsunamis are destroying everything in its path. Buildings, plants, and resulted in human casualties, salt water contamination of agricultural land, soil, and clean water.