earthquakes

3. a layer beneath the mantle about 2260 kilometers thick; the outer core contains liquid iron and generates earth’s magnetic field.
5. a instrument that records seismic waves.
9. the Japanese word for a seismic sea wave.
12. the solid inner most layer of earth, about 1220 kilometers in radius.
14. vibrations that travel through earth carrying the energy released during an earthquake.
17. the thin, rocky outer layer of earth.
18. more precise measure of earthquake magnitude than the Richter scale, which is derived from the amount of displacement that curves along a fault zone and estimates the energy released by an earthquake.
20. -earthquake wave that pushes and pulls rocks in the direction of the wave; also known as a compression wave.
22. the location on earths surface directly above the focus, or orgin, of an earthquake.

1. the vibration of earth produced by the rapid release of energy.
2. the Mohorovicic discontinuity, which is shortened to Moho; it is the boundrary separating the crust from the mantle, discernible by an increase and velocity of seismic waves.
4. a weak plastic layer of the mantle situated below the lithosphere; The rock within this zone is easily deformed.
6. - a seismic wave that shakes particles perpendicular to the direction the wave is traveling.
7. fracture in the earth along which movement has occurred
8. a phenomenon, sometimes associated with earthquakes, and which soils and other unconsolidated materials saturated with water are turned into a liquid that is not able to support buildings.
10. an area along a fault where there has not been any earthquake activity for a long period of time.
11. tendency for deformed rock along a fault to spring back to its original shape after an earthquake.
13. the rigid outer layer of earth, including the crust and upper mantle.
15. the record made by a seismograph.
16. a seismic wave that travels along the surface of earth,
18. the 2890-kilometer-thick layer of earth located below the crust.
19. a small earthquake that follows the main earthquake.
21. the point within earth where an earthquake originates