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Tsunami are large waves caused by sudden movement of the ocean due to earthquakes, landslides, large volcanic eruptions or meteorite impact in the ocean.
Most tsunami are caused by large earthquakes on the seafloor when slabs of rock move past each other suddenly, causing the overlying water to move.

Tsunami - Wikipedia

en.wikipedia.org/wiki/Tsunami

A tsunami 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 ...

Formation of Tsunamis - Tsunami Alarm System

www.tsunami-alarm-system.com/en/phenomenon-tsunami/phenomenon-tsunami-formation.html

The term tsunami from the Japanese and means - Big wave in the port. The term was coined by fishermen who returned to their ports in the evening after their ...

How Tsunamis Form - Windows to the Universe

www.windows2universe.org/earth/tsunami2.html

Apr 28, 2016 ... 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 ...

www.ask.com/youtube?q=How Is a Tsunami Formed?&v=SlwZzbGh7Cw
Dec 25, 2011 ... This simulation shows the formation of tsunami waves and their characteristics as they approach land.

What Causes a Tsunami? - VOA News

www.voanews.com/a/what-causes-a-tsunami-117813908/167170.html

Mar 10, 2011 ... A tsunami is a series of large waves generated by an abrupt movement on the ocean floor that can result from an earthquake, an underwater ...

Tsunami Facts: How They Form, Warning Signs, and Safety Tips

news.nationalgeographic.com/news/2007/04/070402-tsunami.html

Apr 2, 2007 ... In the wake of yesterday's Solomon Islands tsunami, National Geographic News explains how the killer waves are caused, what the warnings ...

How do tsunamis form? | Reference.com

www.reference.com/science/tsunamis-form-47a7eba1eb8d1ac9

Tsunamis are massive waves that form when an ocean is disturbed by an earthquake, landslide, volcanic eruption or other disruptive event. Underwater ...

Tsunami - How a Tsunami Happens

academic.evergreen.edu/g/grossmaz/springle/

Tsunamis are often incorrectly interchanged with the term" tidal waves," which refer to high waves of water caused by changes in the flow and surge of the ocean ...

Tsunamis: how they form - Australian Geographic

www.australiangeographic.com.au/topics/science-environment/2011/03/tsunamis-how-they-form

Mar 18, 2011 ... Tsunamis have occurred through history, but there is still much to learn about them. Here are the basics.