Vocab words:

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Across
  1. 4. 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
  2. 5. a wave vibrating in the direction of propagationseismologistseismologist
  3. 7. a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action
  4. 8. shear or transverse waves, cause points of solid media to move back and forth perpendicular to the direction of propagation; as the wave passes, the medium is sheared first in one direction and then in another
Down
  1. 1. Earth scientists, specialized in geophysics, who study the genesis and the propagation of seismic waves in geological materials
  2. 2. a wave vibrating at right angles to the direction of its propagation
  3. 3. an elastic wave in the earth produced by an earthquake or other means
  4. 6. an instrument that measures and records details of earthquakes, such as force and duration