Across
- 2. the origin of an earthquake
- 4. a type of fast moving lava flow
- 8. the crust and outer mantle of the Earth
- 9. a machine that measures earthquakes
- 11. a fault where rock moves apart
- 12. a fault where rock slides
- 14. a fault where rock moves upward
- 15. the waves caused by movement in the Earth
- 17. the strength of an earthquake
- 18. the type of seismic wave felt on the earth
- 19. the spot above the origin of an earthquake
Down
- 1. the edge of a plate
- 3. the space between plates
- 4. the pieces of the earth's crust
- 5. rock ejected into the air by a volcano
- 6. rock formed from cooled magma and lava
- 7. a huge wave that can do serious damage
- 10. the main vent of a volcano
- 13. the most powerful volcanic eruption
- 16. a fountain that shoots out of hot springs