Tsunami is a Japanese word. ‘Tsu’ means a ports and ‘nami’ means waves. Due to volcanic eruption or an earthquake on the sea/ocean floor, huge, very strong and abnormally high and unimaginably long waves are created. These are called ‘Tsunami’.
Their length is approximately 700 to 1600 km and they travel with great speed and force. By the time these waves reach coast, they become very destructive. They attain great height and power which causes a great deal of destruction on the coast.
Tsunami waves are generated one after another. As a result, devastation near the coastal area continues for many hours. India experienced a tsunami disaster on 26th December, 2004 and Japan on 11th March, 2011.