Across
- 5. Magma that has erupted outside of a volcano
- 7. The size of an earthquake
- 8. A series of waves caused by an earthquake below the sea
- 10. A point where an earthquake begins
- 12. A natural way for earth to release internal pressure
- 14. Below earth's crust
- 15. The system used to measure water surface changes and movements
Down
- 1. caused by unusually low rainfall over a prolonged period of time
- 2. Caused when pressure builds and gases expand
- 3. Mixture of molten and semi-molten rock and gases
- 4. A device to measure and record the size and power of seismic waves
- 6. Is likely to erupt
- 9. The location where seismic waves reach the surface
- 11. Earth scientists who study seismic waves
- 13. Where tectonic plates meet