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  • 1. Earthquakes and Seismic Waves Brendan Gubbini, Rocco Stralle, and Michael Phillips Mrs. Smith 4th April 8, 2011
  • 2. Basic Background Information
    • What is an earthquake?
    • Series of Vibration in the earth’s crust.
    • How are earthquakes measured?
    • They are measured by a Richter scale.
    • What does magnitude mean?
    • magnitude measures the energy released at the source of the earthquake.
    • How is magnitude measured?
    • They are measured by a seismograph.
  • 3. Damage caused by Earthquake
    • Landslides
    • Buildings collapse
    • Power Lines
    • Tsunamis
  • 4. Waves
    • What are earthquake waves called?
    • Seismic waves.
    • What two types of seismic waves are there?
    • Body and Surface Waves
    • What two types of body waves are there?
    • P Waves and S Waves
  • 5. Body Waves
    • How do P waves travel?
    • Solid, Liquid, and Gas, and through the Body Of Earth
    • How do S waves travel?
    • Only through Solid
    • Which move faster?
    • P Waves
  • 6. Elastic Rebound
    • A mechanism used by Geologists to explain Earthquakes and Surface ruptures, seen when deep faults break through Earth’s surface.
  • 7. The Tohoku Earthquake
    • This quake occurred at :
    • March 11, 2o11
    • This quake occurred
    • Towards Northeast part of Honshu, Japan
    • The magnitude of this quake was
    • 9.0
  • 8. Effects on the environment/earth
    • Pacific Plates moved 20m westward
    • Shifted on Earth’s axis about 6.5 inches
    • Somehow caused the Planet to rotate just a little bit faster, shorting the day about 1.8 millions of a second
  • 9. Effects on the People of Japan
    • Thousands were dead
    • Thousand houses were destroyed
    • Lack of power and water
  • 10. Effects on the Economy of Japan
    • Production is slowly declining
    • Thousands of houses were destroyed
    • Factories are in un-workable conditions
  • 11. GPS Sensors
    • One interesting fact about this earthquake is that it moved several GPS sensors. This will require … resetting GPS because of japan
    • How does elastic rebound explain this movement? Ruptures result to strong ground shaking.
  • 12. Tsunamis
    • What is a tsunami?
    • A series of waves caused by an earthquake or other disturbances.
    • How do tsunami waves appear at sea?
    • When undersea earthquakes disrupt water surfaces
    • How high can tsunami waves be?
    • Between 30 to 50 feet they can reach up to 100-300 feet
    • How fast can tsunami waves move?
    • Anywhere from 3omph to about 500 mph
  • 13. Websites Used
    • http://www.diigo.com/user/richardsj/earthquake