Across
- 2. point on fault where earthquake originates
- 7. fracture or system of fractures in Earth's crust
- 11. point on Earth surface directly above the focus
- 12. scale measures the energy released by a quake
- 13. measures movement during a quake
- 15. the type of fault when plates slide past each other
- 17. used evidence to support continental drift
- 18. slowest and usually most destructive quake waves
Down
- 1. when one plate is forced underneath another
- 3. __ waves: vibrations of ground during an earthquake
- 4. the major fault in California
- 5. fault in which plates move toward each other
- 6. wave causes rock to move at right angles to direction of travel(up and down)
- 8. fault in which plates move away from each other
- 9. plates of crust which float/move upon the mantle
- 10. waves that squeeze and push rocks in the direction of travel(back and forth)
- 14. deformation of material
- 16. force acting upon an area: compression, tension and shear