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  • 1. Effects of Earthquakes David Bellon Mrs. Smith 5th hour April 8, 2011
  • 2. About Earthquakes
    • What is an earthquake?
    • Shaking that results from the movement of rock beneath Earth’s surface
    • How are earthquakes measured?
    • A device that converts ground movements into a signal that is recorded and printed. This is called a seismograph
    • What does magnitude mean?
    • The measurement of the Earthquakes sttrenght based on seismic waves
    • How is magnitude measured?
    • The moment-magnitude scale measures magnitude
  • 3. Damage Caused by Earthquakes
    • Can cause unstable objects to fall
    • Dramatic ground movements can cause landslides
    • Buildings can collapse
    • Undersea Earthquakes can send tsunamis onto the land.
  • 4. Waves
    • What are earthquake waves called?
    • Seismic waves
    • What two types of seismic waves are there?
    • P Waves, Primary Waves.
    • S Waves, Secondary Waves.
    • What two types of body waves are there?
    • When P and S Waves arrive at the surface, some of them turn into Surface Waves
  • 5. Body Waves
    • How do P waves travel?
    • P Waves compress and expand and can travel through solids and liquids, these arrive at the surface first
    • How do S waves travel?
    • S Waves vibrate side to side and up and down and can only travel through solids
    • Which move faster?
    • P Waves
  • 6. Elastic Rebound
    • States that Tectonic Plates move relative to each other
    • Transform Boundary
  • 7. The Tohoku Earthquake
    • This quake occurred at :
    • Friday March 11, 2011 5:46 P.M.
    • This quake occurred
    • Northeast of Honshu
    • The magnitude of this quake was
    • 9.0
  • 8. Effects on the environment/earth
    • Japans coastline may have shifted 4 meters
    • Probably shifted the Earth’s axis by 6.5 inches
    • Made the day shorter by 1.8 millionth of a second
  • 9. Effects on the People of Japan
    • Many people died
    • There is a need for food and water
    • Need to find family
  • 10. Effects on the Economy of Japan
    • Type one effect here
    • Type one effect here
    • Type one effect here
    Replace these words with an appropriate image. Replace these words with an appropriate image. Replace these words with an appropriate image.
  • 11. GPS Sensors
    • One interesting fact about this earthquake is that it moved several GPS sensors. This will require …(Type answer here)
    • How does elastic rebound explain this movement?
    • Type your answer here .
  • 12. Tsunamis
    • What is a tsunami?
    • Type your answer here. You can erase the question.
    • How do tsunami waves appear at sea?
    • Type your answer here. You can erase the question.
    • How high can tsunami waves be?
    • Type your answer here. You can erase the question.
    • How fast can tsunami waves move?
    • Type your answer here. You can erase the question.
  • 13. Websites Used
    • Copy and paste the URLs of the websites and articles you used.