Earthquakes

2. The block of rock that forms the lower half of the fault.
3. A type of seismic wave that compresses and expands the ground.
6. The record of an earthquake's seismic waves produced by a seismograph.
9. A type of seismic wave that moves the ground up and down or side to side.
11. A type of seismic wave that forms when P waves and S waves reach earth's surface.
13. A scale that rates an earthquakes magnitude based on the size of the seismic waves.
14. Stress that squeezes rock until it folds or breaks.
17. A type of fault where the hanging wall slides upwards; caused by compression in the crust.
19. An upward fold in rock formed by compression of earth's crust.
22. A scale that rates earthquakes by estimating the total energy released by an earthquake.
24. A downward fold in a rock formed compression in earth's crust.
25. Stress that pushes masses of rock in opposite directions, in a sideways movement.
26. That he shaking that results from the movement of rock beneath the earth's surface.
28. The measurement of an earthquakes strength based on seismic waves and movement along faults.
29. Stress that stretches a rock so that it becomes thinner in the middle.

1. An earthquake that occurs after a larger earthquake in the same area.
4. A building mounted on bearings designed to absorb the energy of an earthquake.
5. A land form that has high elevation and a more or less level surface.
7. A force that acts on a rock to change its shape or volume.
8. The process by which an earthquakes violent movement suddenly turn loose soil into liquid mud.
10. The point beneath earth's surface where rock breaks under stress and causes an earthquake.
12. The force that opposes the motion of one surface as it moves across another surface.
15. A scale that rates earthquakes according to their intensity and how much damage they cause at a particular pace.
16. A type of fault where rocks on either side move past each other sideways with little up-or-down motion.
18. A giant wave usually caused by an earthquake beneath the ocean floor.
20. A type of fault where the hanging wall slides down; caused by tension in the crust.
21. The block of rock that forms the upper half of the fault.
23. A device that records ground movement caused by seismic waves as they move through earth.
27. The point on earth's surface directly above an earthquakes focus.