Restless Earth

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Across
  1. 2. the size of an earthquake
  2. 5. zone of fracture between two blocks of rock
  3. 6. device mounted structures to reduce mechanical vibrations
  4. 7. Series of large waves of extremely long periods usually generated by a violent, impulsive under sea disturbance.
  5. 10. measure of an Earthquakes magnitude
  6. 12. a period of time between two related actions
  7. 16. the bowl shaped depression around the orifice of the volcano
  8. 17. the rigid outer part of the earth
  9. 18. a force that squeezes something together
Down
  1. 1. the point on Earth's surface directly above the starting point of an Earthquake
  2. 3. opening or vents where lava and steam erupt onto the Earth's surface
  3. 4. nonactive
  4. 8. extremely hot liquid located under earths surface
  5. 9. shaking of the surface of the earth
  6. 11. the magnitude of a quantity per unit area
  7. 12. Hot molten rock erupted from a volcano
  8. 13. the point where light rays originating from a point on the object converge
  9. 14. the third layer of the atmosphere
  10. 15. the force transmitted through a rope, string or wire when pulled by forces
  11. 18. the outermost shell of a planet