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Stress And Energy Waves
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Stress And Energy Waves

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Transcript

  • 1. Stress and Energy Waves Movement during an Earthquake
  • 2. October 17, 1989 at 5:04 p.m
  • 3. Stress
    • Stress: Energy stored in the Earth’s crust
    • Stress can build up at plate boundaries.
    • Potential Energy
  • 4. Folding
    • Too much stress can cause the rocks to bend or Fold .
    • This can form Mountains .
    • The Appalachian mountains are folded mountains.
  • 5. The Appalachian Mountains (Tennessee)
  • 6. Faulting
    • When there is too much stress , the rocks in the crust may break .
    • This can cause earthquakes .
  • 7. Fault Lines
  • 8. Seismic Waves
    • Waves of energy that move through the Earth during an Earthquake.
    • There are three types:
      • Primary waves
      • Secondary waves
      • Love-Rayleigh waves
  • 9. Primary (P) waves
    • Body waves move through the interior of the Earth.
    • They are the fastest seismic wave, therefore will always arrive first .
    • Move through solid, liquid and gas.
    • They are compression waves, they move particles forward and backward .
  • 10. S waves
    • Also body waves.
    • Travel more slowly and arrive second .
    • Can only move through solids .
    • Also called shear waves, because they move particles side to side .
    • AKA transverse waves.
  • 11. Love-Rayleigh Waves
    • Surface waves.
    • Solid rock only.
    • Move in a rolling motion.
    • Cause ripples on the surface.
  • 12. Seismology and Seismic Waves