GEOL 212 Study Guide - Quiz Guide: Epicenter
26 Dec 2017
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On a human scale, we see this transition in glacial ice (right). On a larger, scale, the same relationship holds for planets" rocky crusts. Earthquakes result from the quick release of energy when brittle deformation occurs. As a result, they occur within a few tens of km of the surface. Types of energy released when earthquake occurs - waves: body waves: earthquake occurs at the focus, causing energy to propagate outward as body waves - waves that move through solids in three dimensions. There are two types: p-waves: primary or pressure waves. As the wave passes, each particle of the substance it"s passing through moves forward an back in line parallel with the direction of the wave"s propagation. These can be thought of as push pull waves: s-waves: secondary or shear waves. As the wave passes, each particle of the substance it"s passing through moves forward an back in line perpendicular to the direction of the wave"s propagation.
