Tsunami 33
Tsunami 33 : Japanese term meaning wave ("nami") in a harbour ("tsu"). A series of travelling waves of extremely long length and period, usually generated by disturbances associated with earthquakes occurring below or near the ocean floor. A tsunami is an ocean wave produced by a submarine earthquake, landslide, or volcanic eruption. These waves may reach enormous dimensions and have sufficient energy to travel across entire oceans. They proceed as ordinary gravity waves with a typical period between 5 and 60 minutes. Tsunamis become steeper and increase in height as they approach shallow water, inundating low-lying areas. Where local submarine topography causes extreme steeping, they may break and cause great damage. The popular term, tidal wave, is incorrect because tsunamis have no connection with tides
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