Master of Science (MS)
First Committee Member
Catherine M. Snelson
Number of Pages
This study examines the earthquake data recorded in Las Vegas, Nevada by the Las Vegas Valley Broadband array. Teleseismic P-wave arrivals were used to calculate travel time delays at basin sites relative to a hard-rock site. Delays up to 0.45 s were observed within the basin and correspond to thicknesses up to 1.52 km based on an average P-wave velocity of 4.37 km/s. Basin depths are shallower than expected and attributed to the upper unconsolidated basin fill. Regional earthquakes were used to calculate Rayleigh wave interstation group velocities along basin paths. Interstation group velocities range from 0.25 km/s to 2.14 km/s over periods of 1.3 s to 4.0 s. Shear velocities, calculated through inversion, range from 0.28 km/s to 2.85 km/s for the basin sediments and are attributed to the clays and unconsolidated materials within the upper basin. The shallow shear velocities determined through this method correlate well with geotechnical surveys and offer greater depth of penetration making this method a non-invasive means for calculating shear velocity at the basin scale.*; *This dissertation is a compound document (contains both a paper copy and a CD as part of the dissertation). The CD requires the following system requirements: Adobe Acrobat.
Las Vegas; Basin; Depth; Investigating Nevada; Seismological; Shear; Structure; Study; Vegas; Velocity
University of Nevada, Las Vegas
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McEwan, Darlene J, "A seismological study of the Las Vegas basin, Nevada: Investigating basin depth and shear velocity structure" (2005). UNLV Retrospective Theses & Dissertations. 1886.