Earthquakes crosswords puzzle

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Across
  1. 2. synonym of earthquake
  2. 3. middle layer of the Earth made of rocks that form a type of solid paste
  3. 6. movement of rapproachement of two tectonic plates
  4. 8. people who studies seism
  5. 11. movement of plates that sink below another
  6. 14. new earthquakes after a seism
  7. 16. powerful vibrations produced by a seism
  8. 17. synonym of seism
  9. 19. point on the Earth’s surface directly vertically above the hypocentre
  10. 21. vibrations following an earthquake
  11. 22. movement of plates that move away from one another
Down
  1. 1. they make the mantle move
  2. 4. measurement of the strength of a seism
  3. 5. the San Andrea’s one is the most famous
  4. 7. gigantic wave formed when a seism occurs in the sea
  5. 9. land relief due to collision between two plates
  6. 10. plates, large pieces on the Earth’s surface that move several centimeters per year
  7. 12. upper layer of the Earth
  8. 13. point at which the seism originates
  9. 15. our planet
  10. 17. released during a seism when rocks break suddenly
  11. 18. verb that desribes the movement of two plates when they face one another
  12. 20. the centre of the Earth