Earthquakes crosswords puzzle

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