EARTHQUAKES

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Across
  1. 4. inclined fractures where the blocks have mostly shifted vertically
  2. 6. center of an earthquake
  3. 7. perpendicular to the direction the wave is moving.
  4. 9. A P wave
  5. 14. the boundary between the crust and the mantle in the earth
  6. 16. a change in the original shape of a material
  7. 18. strike-slip fault that accommodates relative horizontal slip between other tectonic elements
  8. 20. earthquakes that follow the largest shock of an earthquake sequence
  9. 24. a fracture along which the blocks of crust on either side have moved relative to one another parallel to the fracture
  10. 25. to processes between the earth's crustal plates
  11. 26. water-saturated sediment temporarily loses strength
  12. 27. a seismic body wave that shakes the ground back and forth perpendicular to the direction the wave is moving.
  13. 28. pertains to processes within the plates
  14. 30. the size of the wiggles on an earthquake recording
  15. 33. uniformly applicable to all sizes of earthquakes but is more difficult to compute than the other types
  16. 34. an instrument used to detect and record earthquakes
Down
  1. 1. the point on the earth's surface vertically above the hypocenter
  2. 2. the outermost major layer of the earth
  3. 3. A thrust fault that does not rupture all the way up to the surface
  4. 5. a number describing the severity of an earthquake
  5. 8. surface wave having a horizontal motion that is transverse (or perpendicular) to the direction the wave is traveling.
  6. 10. an instrument used to detect and record earthquakes
  7. 11. the outer solid part of the earth
  8. 12. epicenter is the point directly above it at the surface of the Earth. Also commonly termed the
  9. 13. a record written by a seismograph in response to ground motions produced by an earthquake
  10. 15. the innermost part of earth
  11. 17. vertical (or nearly vertical) fractures where the blocks have mostly moved horizontally
  12. 19. a mathematical device to compare the size of earthquakes
  13. 21. seismic wave that is trapped near the surface of the earth
  14. 22. relatively smaller earthquakes that precede the largest earthquake in a series
  15. 23. a movement of surface material down a slope
  16. 29. an elastic wave generated by an impulse such as an earthquake or an explosion
  17. 31. a number that characterizes the relative size of an earthquake
  18. 32. a seismic body wave that shakes the ground back and forth in the same direction and the opposite direction as the direction the wave is moving.
  19. 33. the part of the earth's interior between the metallic outer core and the crust.