Earthquakes

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Across
  1. 4. An event where the ground shakes
  2. 6. Record produced by a seismograph
  3. 8. Center of an earthquake on earths surface
  4. 12. Study of Earthquakes
  5. 13. Boundary between plates
  6. 14. inside Earths crust where earthquake originates
  7. 17. Upper layer of the earths mantle
  8. 18. Large wave
  9. 20. Smaller earthquake that follows
  10. 23. Faster travelling wave
Down
  1. 1. Waves in an earthquake
  2. 2. Two types of this to measure an earthquake
  3. 3. Layer of rock between crust and outer core
  4. 5. Number that characterizes severity
  5. 7. The size of an earthquake
  6. 9. Wave that moves through earth's interior
  7. 10. Waves caused by earthquakes on the surface
  8. 11. Outer layer of the Earth
  9. 15. Slower travelling wave
  10. 16. The rigid outer part of Earth
  11. 19. Type of zone
  12. 21. Instrument that measures Earthquakes
  13. 22. Center of the Earth