TSUNAMI tsunami (from Japanese : 津波 , "harbour wave"; [1] English pronunciation: / s uː ˈ n ɑː m i / soo- NAH -mee [2] or / t s uː ˈ n ɑː m i / [3] ), sometimes incorrectly referred to as a tidal wave , [4] [5] [6] also known as a seismic sea wave , is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake . Earthquakes , volcanic eruptions and other underwater explosions (including detonations of underwater nuclear devices ), landslides, glacier calvings , meteorite impacts and other disturbances above or below water all have the potential to generate a tsunami. [7] Unlike normal ocean waves, which are generated by wind , or tides , which are generated by the gravitational pull of the Moon and the Sun, a tsunami is generated by the dis...
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Indian Ocean Tsunami of 2004 Indian Ocean tsunami of 2004 , tsunami that hit the coasts of several countries of South and Southeast Asia in December 2004. The tsunami and its aftermath were responsible for immense destruction and loss on the rim of the Indian Ocean. On December 26, 2004, at 7:59 AM local time, an undersea earthquake with a magnitude of 9.1 struck off the coast of the Indonesian island of Sumatra . Over the next seven hours, a tsunami —a series of immense ocean waves—triggered by the quake reached out across the Indian Ocean , devastating coastal areas as far away as East Africa . Some locations reported that the waves had reached a height of 30 feet (9 metres) or more when they hit the shoreline. The tsunami killed at least 225,000 people across a dozen countries, with Indonesia , Sri Lanka , India , Maldives , and Thailand sustaining massive damag...