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Teleseismic-Seismic Monitoring At Coso Geothermal Area (1988)
ExpActivityDate 1988  +
ExplorationBasis To analyze three-dimensional V<sub>p</sub>/V<sub>s</sub> variation  +
ExplorationOutcome useful  +
ExplorationTechnique Teleseismic-Seismic Monitoring +
Notes A tomographic inversion for the 3D variati
A tomographic inversion for the 3D variations of the V<sub>p</sub>/V <sub>s</sub>, the ratio of compressional to shear velocity, was performed. Iterative back projection of 2966 shear and compressional wave travel time residuals from local earthquakes recorded on vertical instruments reveals that V<sub>p</sub>/V<sub>s</sub> is generally high at the surface and decreases systematically to 10 km depth. Near Devil's Kitchen in the Coso Geothermal Area, V<sub>p</sub>/V<sub>s</sub> values are very low near the surface, consistent with measured values for steam-dominated geothermal systems. Abnormally high values of V<sub>p</sub>/V<sub>s</sub> are observed in portions of Indian Wells Valley and also below the Cactus Peak rhyolite dome from 2 to 5 km in depth. In Indian Wells Valley the co-occurrence of low P velocities, low S velocities, high V<sub>p</sub>/V<sub>s</sub>, and anomalous SV attenuation are indicative of subsurface partial melt.
are indicative of subsurface partial melt.  +
OpenEI/PageDescription Teleseismic-Seismic Monitoring At Coso Geothermal Area (1988): geothermal exploration activity.  +
OpenEI/PageKeyword Geothermal  + , Coso Geothermal Area  + , Teleseismic-Seismic Monitoring  +
Place Coso Geothermal Area +
Reference material Three-dimensional V p /V s variations for the Coso region, California +
Has query
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Teleseismic-Seismic Monitoring At Coso Geothermal Area (1988) + , Teleseismic-Seismic Monitoring At Coso Geothermal Area (1988) +
Categories Exploration Activities , Geothermal
Modification date
"Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by Semantic MediaWiki.
21:28:30, 22 June 2012  +
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