26 EARTHQUAKES - EARTHQUAKES * definition: a shaking and...

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EARTHQUAKES * definition: a shaking and trembling of the earth’s surface from a sharp release of energy; the sudden release of stresses that have been building slowly wihin the crust * seismic waves: a term used to describe the energy as it passes through the Earth’s crust and interior ** types of seismic waves: L wave: surface wave which travels along the earth's surface P wave: compression or 'push' wave which moves material parallel to its direction of movement; S wave: shear or 'shake' wave which moves material at right angles to its direction of movement; * focus: place of origin of an earthquake; * epicenter: point on the Earth’s surface directly above the focus of an earthquake; the point from which the L waves are generated * fault: fracture in crustal rock along which displacement of rock has occurred on one side in respect to the other side How to measure earthquakes? magnitude vs intensity * magnitude: amount of shaking of the ground during an earthquake; measured by a
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This note was uploaded on 04/14/2008 for the course GEOG 1111 taught by Professor Hopkins during the Spring '08 term at University of Georgia Athens.

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26 EARTHQUAKES - EARTHQUAKES * definition: a shaking and...

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