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Across 6. the boundary seperating the crust and the mantle 7. scale based on the motion of a seismograph 11. The solid, innermost layer of earth 16. displacement along a fault located on the ocean floor 18. The study of Earthquakes 19. a belt where p waves are absent 23. instuments that record earthquake waves 24. the total amount of energy released during an earthquake 25. seismic waves that travel along earths outer layer 27. A measure of the degree of earthquake shaking,based on the amount of damage 28. the fastest earthquake wave 29. records taken from a seismograph 32. The sudden release of stored strain in rocks that results in movement along a fault 33. Slow, gradual displacement along a fault that occurs relatively smoothly

Down 1. The zone within the Earth where rock displacement produces ans earthquake 2. a 12 point scale developed to evaluate earthquake intensity 3. A subdivsion of the mantle situated below the lithosphere. This zone is dpths of 100km-700km 4. a more precise measure of the earthquake magnetude than the Richter scale 5. A layer beneath the mantle about 2270km thick,and has the properties of a liquid 8. another name for the mesosphere 9. Vibration of Earth produced by the rapid release of energy 10. slower moving surface wave 12. The ridgid outer layer of Earth, including the crust and upper mantle 13. stable soil turns into a fluid that can not support building stuctures 14. The thin ourtermost layer of Earth 15. small Earthquake the often precede a major Earthquake 17. A seismic wave that travels through Earth's interior 20. The location on Earth's surface that that lies directly above the focus of an earthquake 21. A smaller Earthquake that follows the main earthquake 22. the part of the mantle that extends from the core mantle boundary to a depth of 660km 26. A break in a rock mass along which movement has occured 30. thick layer of Earth located below the crust