Geology Crossword

4. A scale ranging from 1 to 10, for indicating the intensity of an earthquake.
12. A wave vibrating at right angles to the direction of its propagation.
13. A series of vibrations induced in the earth's crust by the abrupt rupture and rebound of rocks in which elastic strain has been slowly accumulating.
14. The region below the lithosphere in which the rock is less rigid than that above and below but rigid enough to transmit transverse seismic waves.
15. A longitudinal earthquake wave that travels through the interior of the earth and is usually the first conspicuous wave to be recorded by a seismograph.
16. A break in the continuity of a body of rock or of a vein, with dislocation along the plane of the fracture.
17. A transverse or longitudinal earthquake wave that travels through the interior of the earth.
19. An instrument used for measuring and recording the vibrations of earthquakes.
20. The science that deals with the dynamics and physical history of the earth, the rocks of which it is composed, and the physical, chemical, and biological changes that the earth has undergone or is undergoing.

1. A point directly above the true center of disturbance from which the shock waves of an earthquake apparently radiate.
2. The science or study of earthquakes and their phenomena.
3. A theory of global tectonics in which the lithosphere is divided into a number of crustal plates,each of which moves on the plastic asthenosphere more or less independently to collide with,slide under,or move past adjacent plates.
5. The area of the earth that does not receive any direct P waves.
6. A wave along the surface of a solid, elastic body, especially along the surface of the earth.
7. A transverse earthquake wave that travels through the interior of the earth and is usually the second conspicuous wave to reach a seismograph.
8. A surface wave having a horizontal motion that is transverse to the direction the wave is traveling.
9. A seismic wave that travels along or parallel to the earth's surface.
10. A wave of energy generated by an earthquake.
11. The crust and upper mantle of the earth.
18. A compressional wave of high amplitude caused by a shock (as from an earthquake or explosion) to the medium through which the wave travels.