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How do tsunamis form?

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Tsunami waves are formed as the displaced water, which acts under the influence of gravity, attempts to find a stable position again. Undersea landslides, which can be caused by large earthquakes, can also cause tsunami waves to form as water attempts to find a stable position. read more

Tsunamis are massive waves that form when an ocean is disturbed by an earthquake, landslide, volcanic eruption or other disruptive event. Underwater earthquakes, which occur at the boundaries of tectonic plates, are one of the most common causes of tsunamis. read more

How Tsunamis Form A tsunami is a series of waves generated in an ocean or other body of water by a disturbance such as an earthquake, landslide, volcanic eruption, or meteorite impact. The picture at the left shows how an earthquake can generate a tsunami in the overlying water. read more

The term "tsunami" is a borrowing from the Japanese tsunami 津波, meaning "harbour wave". For the plural, one can either follow ordinary English practice and add an s, or use an invariable plural as in the Japanese. read more

In some places a tsunami may cause the sea to rise vertically only a few inches or feet. In other places tsunamis have been known to surge vertically as high as 100 feet (30 meters). Most tsunamis cause the sea to rise no more than 10 feet (3 meters). read more

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