TSUNAMI
By: Sarah I. Eturma
Bsed-Biological Science II
April 24,2012
TSUNAMI
the phenomenon tsunami (soo-NAH-
mee) is a series of water caused by the
displacement of a large volume of a
body ...
ALLabout Tsunami
• Length from crest to crest is a hundred miles or
more and its height from crest to trough only few
feet or more.
• In th...
• In 1963 the term tsunami was adopted for
general use by an international scientific
conference.
• Tides are the result o...
 The sea floor deforms and displaces the overlying
water from its equilibrium position.
 Its main factor determines the ...
 Gravitational forces propagate the tsunami given
its initial perturbation of the sea-level.
 Violent marine volcanic er...
 A wave is characterized as a shallow- water
wave.
 The speed of shallow-water wave is equal to the
square root of the p...
 The change of the total energy of the tsunami will
remains constant.
 When a tsunami finally reaches the shore , it may...
The Development of a Tsunami:
A Tsunami Hits the Coast:
Wind-Generated Waves vs.
Tsunami Waves:
Indian Ocean Tsunami
Japan Tsunami
Tsunami
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Tsunami

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Created by Sarah Eturma from University of Southeastern Philippines taking Bachelor of Science in Secondary Education Major in Biological Science.

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Tsunami

  1. 1. TSUNAMI By: Sarah I. Eturma Bsed-Biological Science II April 24,2012
  2. 2. TSUNAMI the phenomenon tsunami (soo-NAH- mee) is a series of water caused by the displacement of a large volume of a body of water.
  3. 3. ALLabout Tsunami
  4. 4. • Length from crest to crest is a hundred miles or more and its height from crest to trough only few feet or more. • In the deepest oceans , the waves will reach speeds exceeding 600 miles per hour (970 km/hr). • When the tsunami enters the shoaling water of coastlines in its path, the velocity will diminishes and the wave height is increases. • Shallow waters heights exceeding 100 ft.(30m).
  5. 5. • In 1963 the term tsunami was adopted for general use by an international scientific conference. • Tides are the result of gravitational influences of the moon, sun and planets. • Scientific community referred to tsunamis as “seismic sea waves”.
  6. 6.  The sea floor deforms and displaces the overlying water from its equilibrium position.  Its main factor determines the initial size of a tsunami is the amount of vertical sea floor deformation.  Controlled by the earthquake’s magnitude , depth, fault characteristics and coincident slumping of sediments.  Submarine landslides, which occur during a large earthquake.
  7. 7.  Gravitational forces propagate the tsunami given its initial perturbation of the sea-level.  Violent marine volcanic eruption create an impulsive force that displaces the water column. • Wind-generated waves have period of five – twenty seconds and wavelength of about 100- 200 meters.  Tsunami period in the range of 10 minutes to 2 hours and wavelength excess of 300 miles.
  8. 8.  A wave is characterized as a shallow- water wave.  The speed of shallow-water wave is equal to the square root of the product of the acceleration of gravity (32ft/sec/sec) and the depth of the water.  As a tsunami leaves the deep water of the open sea propagates into the more shallow waters near the coast, it undergoes a transformation.
  9. 9.  The change of the total energy of the tsunami will remains constant.  When a tsunami finally reaches the shore , it may appear as a rising or falling tide, a series of breaking waves or even a bore.  Tsunami it may form into a bore: a step-like wave with a steep breaking front.  Water level can rise to more than 50 feet for the tsunamis of distant origin and over 100 feet near the earthquake’s epicenter.
  10. 10. The Development of a Tsunami:
  11. 11. A Tsunami Hits the Coast:
  12. 12. Wind-Generated Waves vs. Tsunami Waves:
  13. 13. Indian Ocean Tsunami
  14. 14. Japan Tsunami

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