Lacey intro - The wear on a fault ranges anywhere from ten...

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Tayler Lacey The San Jacinto Fault is part of the more well known San Andreas Fault System. It is located in Southern California and branches from the Transverse Range in a southeastern direction towards the Salton Trough running northwest to southeast. The San Jacinto Fault is the most seismically active fault in Southern California having a geologic slip rate of 12-14 mm per year (Hong and Menke 2005). It is not one continuous band and is instead many faults along a continuous plane. It is considered a strike slip fault, resulting in subsidence in releasing bends and steps at the subsurface San Jacinto basin. Contraction, folding, thrusting, and uplift in restraining steps are shown in the Ocotillo Badlands. Observing the structure of active fault zones can play a key role in interpreting seismic activity throughout the active fault. Knowing the affects of past seismic activity and structural wear and damage can show possibilities of future earthquakes.
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Unformatted text preview: The wear on a fault ranges anywhere from ten meters to hundreds of meters wide and several kilometers deep. By studying the low shear velocity at a depth of 15-20km, within the fault planes, the wear can be determined. The seismic structure reflects the physical and chemical conditions and is closely related to the fault strength. An understanding of these directly relates to earthquake physics and potential seismic hazards. Another important feature to look at is the direct result that an earthquake has on the mountains around the fault including drainage. If the rocks are altered in grain size it will affect the permeability of that area. (Hong and Menke et al., 2005) The purpose of this paper is to research various methods that are used in the interpretation of structural damage to the San Jacinto fault. This information is useful in determining the previous earthquakes that have already occurred as well as ones to come....
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This note was uploaded on 02/27/2012 for the course GEOL 33 taught by Professor E during the Spring '12 term at University of South Florida - Tampa.

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