Earthquakes

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Across
  1. 1. Longest earthquake in the sequence.
  2. 3. A fracture along the earths surface.
  3. 6. Attraction between two masses.
  4. 8. A linear depression of the sea floor caused by subduction.
  5. 9. Geologic time of the time pan in which rock decays.
  6. 10. How fast the earth is shaking.
  7. 11. Increased shaking levels.
  8. 12. Inclined fracture where the blocks have mostly shifted.
  9. 13. Are earthquakes that follow the largest shock of the earthquake.
  10. 16. Stress changes in the earth results of the ground shaking.
  11. 18. The outermost layer of earth, the uppermost part of it is brittle enough to produce an earthquake.
  12. 20. The number of times somthing occur in a time frame.
Down
  1. 2. A wave trapped in the suface of the earth.
  2. 4. Earth's innermost layer.
  3. 5. the stress that tends to pull somthing apart.
  4. 7. Describing the levels of severity on the impact of the earthquake surface.
  5. 14. The point in which the earthquake rupture starts.
  6. 15. Hard rock found beneath softer rock such as sediment rock.
  7. 17. The study of planet earth.
  8. 19. A wave that shakes the ground in a back and forth motion.