SBS Finals C8
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Created by:
sklingenberg on November 28, 2011
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13 terms
Terms | Definitions |
|---|---|
 seismology | the study of earthquakes |
| deformation | the bending, tilting, and breaking of the Earth's crust; the change in the shape of rock in response to stress |
| elastic rebound | the sudden return of elastically deformed rock to its undeformed shape |
| seismic wave | a wave of energy that travels through the Earth, away from an earthquake in all directions |
| P waves | a seismic wave that causes particles of rock to move in a back-and-forth direction |
| S waves | aseismic wave that causes particles of rock to move in a side-to-side direction |
| seismograph | an instrument that records vibrations in the ground and determines the location and strength of an earthquake |
| seismogram | a tracing of earthquake motion that is created by a seismograph |
| epicenter | the point on Earth's surface directly above an earthquake's starting point, or focus |
| focus | the point along a fault at which the first motion of an earthquake occurs |
| gap hypothesis | a hypothesis that is based on the idea that a major earthquake is more likely to occur along the part of an active fault where no earthquakes have occurred for a certain period of time |
| seismic gap | an area along a fault where relatively few earthquakes have occurred recently but where strong earthquakes have occurred in the past |
| fault | a break in the Earth''s crust along which blocks of the crust slide relative to one another |
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