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    Ryan+and+aaron Ryan+and+aaron Presentation Transcript

    • Seismic Waves Aaron Kafkakis Ryan Harris Mrs. Smith Hour: 4 April 8, 2011
    • Basic Background Information
      • What is an earthquake?
      • An Earthquake is what happens when two blocks of Earth suddenly slip or crack past eachother.
      • How are earthquakes measured?
      • Earthquakes are measured in Seismic Waves measured by Seismographs.
      • What does magnitude mean?
      • The size of an Earthquake is called its Magnitude
      • How is magnitude measured?
      • Magnitude is measured by the size of their Seismic Waves.
    • Damage Caused by Earthquakes
      • Buildings suddenly collapse
      • Tsunamis begin to occur
      • Buildings shake and shutter
    • Waves
      • What are earthquake waves called?
      • Seismic Waves
      • What two types of seismic waves are there?
      • Primary and Secondary Waves
      • What two types of body waves are there?
      • Love and Rayleigh Waves
    • Body Waves
      • How do P waves travel?
      • They push and they pull
      • How do S waves travel?
      • They travel side to side, and up and down.
      • Which move faster?
      • P-waves move faster.
    • Elastic Rebound
      • A mechanism used by Geolgists to explain Earthquakes and suface ruptures.
      • The Elastic Rebound occurs in Divergent Boundaries
    • The Tohoku Earthquake
      • This quake occurred at :
      • 5:30 PM
      • This quake occurred
      • In Honshu, Japan.
      • The magnitude of this quake was
      • 9.0
    • Effects on the environment/earth
      • Nuclear Wastes from Power Plants escape into the evironment
      • Many cities and Humans are heavily damaged
      • Large cracks and sinkholes .
    • Effects on the People of Japan
      • People do not have power from destroyed power plants.
      • Tsunamis flood cities in Japan.
      • Houses and buildings are toppled over.
    • Effects on the Economy of Japan
      • Many offices shut down and people lost jobs.
      • Food and water become scarce and polluted.
      • Fires burn down buildings and kill hundreds.
    • GPS Sensors
      • One interesting fact about this earthquake is that it moved several GPS sensors. This will require all of the GPS sensors to be rearranged.
      • How does elastic rebound explain this movement?
      • Because the boundaries at the Elastic Rebound point shifted, moving Japan.
    • Tsunamis
      • What is a tsunami?
      • A giant wave usually caused by an earthquake.
      • How do tsunami waves appear at sea?
      • After an earthquake hits, the waves cause the water to rise up and move.
      • How high can tsunami waves be?
      • About 50 to 250 feet high.
      • How fast can tsunami waves move?
      • One hundred MPH in deep ocean water.
    • Websites Used
      • http://www.diigo.com/user/richardsj/earthquake
      • http://www.google.com/