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Book f chap. 5


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Book f chap. 5

  1. 1. • The study of earthquakes.
  2. 2. • A break in the Earth’s crust along which blocks of the crust slide relative to one another due to tectonic forces.
  3. 3. • The change in the shape of rock in response to stress
  4. 4. • the sudden return of elastically deformed rock to its original shape
  5. 5. • Waves of energy that travel through the Earth.
  6. 6. pressure waves; the fastest type of seismic waves they can travel through solids, liquids, and gases. Aka: primary waves
  7. 7. Shear waves. Second fastest seismic waves, can’t travel through materials that are completely liquid aka: secondary waves
  8. 8. Made by breezy. :]
  9. 9. Seismograph: an instrument located at or near the surface of the Earth that records seismic waves.
  10. 10. Seismogram • a tracing of earthquake motion created by seismograph
  11. 11. Epicenter • the point on the Earth’s surfaced directly above an earthquake’s starting point
  12. 12. Focus • The point inside the earth where an earthquake begins.
  13. 13. Ch. 5 Sec. 3
  14. 14. Gap Hypothesis • states that sections of active faults that have had relatively few earthquakes are likely to be the sites of strong earthquakes in the future
  15. 15. seismic gap • an area along a fault where relatively few earthquakes have occurred
  16. 16. • A place within the Earth’s where the speed of seismic waves increase sharply; marks the boundary between the Earth’s crust and mantle.
  17. 17. An area on the Earth’s surface where no direct seismic waves from a particular earthquake can be detected