Tsunamis by ramee teklemichael

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Tsunamis by ramee teklemichael

  1. 1. Tsunamis<br />By Ramee Teklemichael<br />
  2. 2. A tsunami is a series of water waves caused by the displacement of a large volume of a body of water, usually an ocean.<br />
  3. 3. Earthquake, volcanic interruption, and other underwater explosions cause tsunamis. <br />
  4. 4. The term of tsunami comes from two Japanese words tsu meaning harbor and nami meaning wave. <br />
  5. 5. Tsunamis are referred as tidal waves but in the recent years the term as fallen out of favor because tsunamis have nothing to do with tides. <br />
  6. 6. Tsunamis have a small wave height offshore, and a very long wavelength often hundreds of kilometers long, which is why they generally pass unnoticed at sea, forming only a slight swell usually about 300 millimeters above the normal sea surface. <br />
  7. 7. When the wave enters shallow water, it slows down and its height increases.<br />
  8. 8. Regions with a high tsunami risk use tsunami warning systems to warn the population before the wave reaches land. <br />
  9. 9. Computer models can predict tsunami arrival, usually within minutes of the arrival time.<br />
  10. 10. A 2004 earthquake in the Indian Ocean measuring 9.0 on the scale set off a tsunami that struck at 10 Asian and three African countries, leaving at least 130,000 people dead. <br />
  11. 11. The 2011 earthquake in japan caused a 9.0 tsunami, 9,523 deaths, 2,775 injured, 16,094 people missing, and 125,000 buildings damaged. <br />
  12. 12. Not counting the 2011 tsunami in Japan, there were 26 tsunamis that killed at least 200 people or more in the last century.<br />
  13. 13. Most tsunami occur in the Pacific and Indian Oceans. The boundary of the Pacific Ocean experiences frequent earthquakes.<br />
  14. 14. In the open ocean, a tsunami can travel as fast as 950 kilometers per hour, which can be represented by the speed of a passenger jet.<br />
  15. 15. It loses speed as it approaches land, but it does not lose much of its energy. As it slows down, the height of the waves build.<br />
  16. 16. Tsunami warning sign<br />
  17. 17. THE END<br />

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