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    Lyricandbrooke Lyricandbrooke Presentation Transcript

    • Earthquakes! Brooke Brown Lyric Estrada Mrs. Smith 3rd Hour April 8, 2011
    • Basic Background Information
      • What is an earthquake?
      • The Shaking that results from the movement of rock beneath earth’s surface.
      • How are earthquakes measured?
      • Seismograph
      • What does magnitude mean?
      • The measurement of an earth quakes strength based based on seismic waves and movement along faults.
      • How is magnitude measured?
      • Mercalli scale, and richter scale.
    • Waves
      • What are earthquake waves called?
      • Seismic waves, P waves, S waves, surface waves.
      • What two types of seismic waves are there?
      • P waves (Primary), S waves (Secondary).
      • What two types of body waves are there?
      • Body and surface waves.
    • Body Waves
      • How do P waves travel?
      • P waves travel through the body of the earth.
      • How do S waves travel?
      • S waves travel only through solids.
      • Which move faster?
      • P waves travel faster than S waves.
    • Elastic Rebound
      • Elastic Rebound, is a theory which attributes faulting to stresses.
      • Elastic rebound occurs in the transform boundary.
    • The Tohoku Earthquake
      • This quake occurred at :
      • March 11. At 2:46.
      • This quake occurred
      • Japan.
      • The magnitude of this quake was
      • 9.0 magnitude.
    • Effects on the People of Japan
      • Thousands of people are confirmed dead, injured or missing.
      • Towns in the country’s northeast coast were literally wiped out.
      • Countless people are seeking shelter.
    • GPS Sensors
      • All the GPS’s will have to be reset.
      • How does elastic rebound explain this movement.
      • As plates on opposite sides of a fault are subjected to force and shift, they accumulate energy and slowly deform until their intial strength is exceeded.
    • Tsunamis
      • What is a tsunami?
      • A giant wave caused by an earthquake on the ocean floor.
      • How do tsunami waves appear at sea?
      • 3 or 4 foot waves.
      • How high can tsunami waves be?
      • Depends on the depth and size.
      • How fast can tsunami waves move?
      • 475 mph in 15,000 feet of water last slide, copy the links.
    • Websites Used
      • Diigo.com