Across
- 2. A single number that geologists assign to an earthquake based on the earthquake's size
- 6. A fault in which the blocks move in the reverse direction as a normal fault
- 10. A fault in which the rocks on either side of the fault slip past each other sideways
- 11. The stress force that squeezes rock until it folds or breaks
- 12. The stress that pulls on the crust and thins rock in the middle
- 13. Seismic waves that move more slowly than P waves and S waves
- 15. Seismic waves that compress and expand the ground
- 18. Rates the amount of shaking from an earthquake
- 19. An instrument that records and measures an earthquake's seismic waves
Down
- 1. A magnitude scale used to rate the total energy an earthquake releases
- 3. The shaking and trembling that results from movement of rock beneath Earth's surface
- 4. A large area of flat land elevated high above sea level
- 5. A fault that cuts through rock at an angle, so one block sits over the fault, while the other block lies under the fault.
- 7. The point on the surface directly above the focus
- 8. The record of an earthquake's seismic waves produced by a seismograph
- 9. The earliest magnitude scale
- 14. Stress that pushes a mass of rock in two opposite directions
- 16. Seismic waves that can vibrate from side to side or up and down
- 17. The area beneath Earth's surface where rock that was under stress begins to break or move