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Tsunami. Kim Britsch, Olivia Storey, and Alex Martin. What is a tsunami?. A tsunami is a series of water waves that is caused by the displacement of a large volume of a body of water. A tsunami may travel hundreds of kilometers across the deep ocean, reaching speeds of about 450 to 500 mph.

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tsunami

Tsunami

Kim Britsch, Olivia Storey, and Alex Martin

what is a tsunami
What is a tsunami?
  • A tsunami is a series of water waves that is caused by the displacement of a large volume of a body of water.
  • A tsunami may travel hundreds of kilometers across the deep ocean, reaching speeds of about 450 to 500 mph.
  • Upon entering shallow coastal waters, the wave, which may have been only about a foot or two high out at sea, suddenly begins growing rapidly. By the time it reaches the shore, it may become a towering wall of water 15m (50 ft) high or more, capable of destroying entire coastal settlements.
causes
Causes
  • A tsunami can be generated by ANY disturbance that displaces a large water mass from its equilibrium position.
  • Most often, it is an earthquake that triggers a tsunami, but other possible contributors are: undersea landslides, volcanic eruptions, explosions, and rarely, impacts of cosmic bodies (such as a meteorites in the ocean),
where tsunamis occur
Where tsunamis occur
  • About 80 percent of all tsunamis occur within the Pacific Ocean’s “Ring of Fire,” a geologically active area where tectonic shifts make volcanoes and earthquakes common.
warning sign
Warning Sign
  • A tsunami’s trough, the low point beneath the wave’s crest, often reaches shore first. When it does, it produces a vacuum effect that sucks coastal water seaward and exposes harbor and sea floors. This retreating of sea water is an important warning sign of a tsunami, because the wave’s crest and its enormous volume of water typically hit shore five minutes or so later. Recognizing this phenomenon can save lives.
references
References
  • Tsunamis and earthquakes. (2010, January 05). Retrieved from http://walrus.wr.usgs.gov/tsunami/
  • Natural disasters. (1996, November). Retrieved from http://www.fiu.edu/~longoria/natural/
  • Tsunamis: killer waves. (2005). Retrieved from http://environment.nationalgeographic.com/environment/natural-disasters/tsunami-profile.html
tsunami video
Tsunami Video
  • http://www.youtube.com/watch?v=j9JDzBTwiig