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Emily Emily Presentation Transcript

  • Earthquakes Hayley Cross and Emily Janis Mrs. Smith 5th hour April 8, 2011
  • Earthquake Background Information
    • What is an earthquake?
    • Earthquakes are the shaking that results from the movement of rock beneath Earth’s surface.
    • How are earthquakes measured?
    • Earthquakes are measured by seismographs.
    • What does magnitude mean?
    • The measurement of Earthquakes strength based on seismic waves and movement along faults.
    • How is magnitude measured?
    • Magnitude is measured on the Moment Magnitude Scale.
  • Damage Caused by Earthquakes
    • Landslides
    • Building Collapse
    • Tsunamis
    • Power Outages
  • Waves
    • What are earthquake waves called?
    • Seismic Waves
    • What two types of seismic waves are there?
    • Body Waves and Surface Waves
    • What two types of body waves are there?
    • P waves and S waves
  • Body Waves
    • How do P waves travel?
    • They compress and expand like and accordion
    • How do S waves travel?
    • They vibrate up and down as well as side to side.
    • Which move faster?
    • Primary
  • Elastic Rebound
    • A Mechanism used by geologists to explain Earthquakes and surface ruptures, seen when a deep fault’s movement breaks through to the Earth’s surface.
    • They occur at all types of plate boundaries.
  • The Tohoku Earthquake
    • This quake occurred at :
    • March 11, 2011 at 9:10 am eastern time
    • This quake occurred
    • Honshu, Japan
    • The magnitude of this quake was
    • 9.0
  • Effects on the environment/earth
    • It caused a tsunami
    • Surface ruptures
    • Landslides
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  • Effects on the People of Japan
    • Oiling Blackouts
    • Damage of nuclear power plants
    • Losses of Hundreds of thousands of lives
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  • Effects on the Economy of Japan
    • Production is expected to decrease
    • High costs of rebuilding.
    • Disruption of power and water
  • 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 reset
    • How does elastic rebound explain this movement?
    • It can detect an objects ability to return to its original shape.
  • Tsunamis
    • What is a tsunami?
    • A long high sea wave caused by an earthquake or other disturbances.
    • How do tsunami waves appear at sea?
    • Very small
    • How high can tsunami waves be?
    • From 30 to 300 feet
    • How fast can tsunami waves move?
    • 30 to 500 mph
  • Websites Used
    • ttp://www.diigo.com/user/richardsj/earthquake