The word ‘Tsunami' comes from the Japanese meaning: harbor waves. A Tsunami is a huge and destructive wave of oceanic water; they are usually a series of enormous waves known as a Tsunami chain. Tsunami is one of the most feared natural disasters on the planet Earth. However Tsunami only affects the coastal cities or countries. Usually what causes of Tsunami is sudden movement the ocean floor. The sudden movement of the ocean can be a earthquake, a powerful volcanic eruption, a underwater landslide or a meteorite crash in the ocean. If the tectonic plates beneath the ocean will change course, vibrate or hit one another a earthquake will be generated on the oceans floor causing displacement of millions of cubic meters of water. This displacement will eventually convert into massive waves hence a Tsunami. An earthquake produced Tsunami affected the coast of Chile in 1960.

Usually earthquake is what causes a Tsunami. However Tsunamis are also produced by a powerful volcanic eruption, when a volcano erupts near a ocean or sea it erupts with so much grave and huge amounts of energy released it creates movement on the ocean floor moving the tectonic plates a series of huge waves are produced. A Volcanic eruption produced Tsunami affected Southern Sumatra in 1883.

In underwater land sliding the components of the upper surface of the ocean floor move from their original place, This movement causes the water on the moving surface to displace the water which generate into very high waves therefore a Tsunami. A landslide causing tsunami occurred in British Colombia in the 15^th century.

A meteorite or an asteroid are foreign masses or huge chunks of rocks if they crash into the ocean they can displace the same volume of water as theirs. It will create a huge wave but it will be of fixed volume a similar tsunami affected Yucatan 65million years ago.