EESC1168 Study Guide - Gneiss, Plagioclase, Glossopteris
2 Apr 2014
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Document Summary
The energy of an earthquake is released in seismic waves and travels away from focus point: body waves: those that travel through the body of the earth, move through the rock body of the earth, p wave: extension and compression, rock undergoes rapid strain as waves travel over it repetition of extension and compression, horizontal stress that rock receives, compressional (push pull) primary, peppy , coil of wire, arrive before s waves, s wave: motion in right angles (cid:223) (cid:224) Richter magnitude: m=log h/t +y: related to the amount of ground displacement of shaking that occurs, based on originally arbitrary choices, a logarithmic scale, open ended(cid:224)but has a natural limit of a little over 9, moment magnitude: a scale that takes into account the area of break on the fault during the quake the strength of the rock and the displacement.
