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Browsing Geological Sciences and Engineering - Faculty Research by Issue Date
Now showing items 1-20 of 125
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Seismic depth imaging of normal faulting in the Southern Death Valley basin
(Society of Exploration Geophysicists, 1/1/1996) -
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Correlation Length and Fractal Dimension Interpretation from Seismic Data Using Variograms and Power Spectra,” Geophysics 66
(1/1/2001)CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Recent modeling techniques for fluid flow in a reservoir or an aquifer require characterizing the statistics of the spatial variability of physical ... -
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Quaternary extensional growth folding beneath Reno, Nevada, imaged by urban seismic profiling
(1/1/2013)We characterize shallow subsurface faulting and basin structure along a transect through heavily urbanized Reno, Nevada, with high?resolution seismic reflection imaging. The 6.8 km of P?wave data image the subsurface to ... -
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A generalized simulated-annealing optimization for inversion of first-arrival times
(10/1/1994)We employ a Monte Carlo-based optimization scheme called generalized simulated annealing to invert first-arrival times for velocities. We use “dense” common depth point (CDP) data with high multiplicity, as opposed to ... -
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Use of Distributed Temperature Sensing Technology to Characterize Fire Behavior
(10/17/2016)We evaluated the potential of a fiber optic cable connected to distributed temperature sensing (DTS) technology to withstand wildland fire conditions and quantify fire behavior parameters. We used a custom-made ‘fire cable’ ... -
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Inversion of seismic reflection traveltimes using a nonlinear optimization scheme
(11/1/1993)We present the use of a nonlinear optimization scheme called generalized simulated annealing to invert seismic reflection times for velocities, reflector depths, and lengths. A finite?difference solution of the eikonal ... -
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A Shallow Shear-Wave Velocity Transect across the Reno, Nevada, Area Basin
(12/1/2004)In October and November 2001, we performed an urban shear-wave velocity transect across 16 km of the Reno, Nevada, area basin. Using the refraction microtremor method of Louie (2001) we determined shear-wave velocity versus ... -
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Blind Shear-Wave Velocity Comparison of remi and masw Results with Boreholes to 200 m in Santa Clara Valley: Implications for Earthquake Ground-Motion Assessment
(12/1/2005)Multichannel analysis of surface waves (masw) and refraction microtremor (remi) are two of the most recently developed surface acquisition techniques for determining shallow shear-wave velocity. We conducted a blind ... -
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Characterization of Near-Surface Geology at Strong-Motion Stations in the Vicinity of Reno, Nevada
(12/1/2007)We evaluate site conditions at each of the 21 Advanced National Seismic System (ANSS) strong-motion stations in the Reno–Sparks, Nevada, area. Shallow shear-wave velocities are measured using the refraction microtremor ... -
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Station Delays, Their Standard Deviations, and Event Relocations in the Reno-Area Basin from a Dense Deployment During the 2008 West Reno Earthquake Swarm
(12/1/2009)The Nevada Seismological Laboratory (NSL) conducted a citizen volunteer multiple-instrument temporary deployment using 90 USArray Flexible Array single-channel RefTek RT-125A (Texan) recorders. Stations were deployed at ... -
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Three-dimensional imaging of steeply dipping structure near the San Andreas Fault, Parkfield, California
(2/1/1988)Shot gathers from the Parkfield, California, deep crustal seismic reflection line, recorded in 1977 by COCORP, reveal coherent events having horizontal to reverse moveouts. These events were migrated using a multioffset ... -
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Shear-wave velocity structure in the northern Basin and Range province from the combined analysis of receiver functions and surface waves
(2/1/1997)A new method based on the joint inversion of receiver functions and surface-wave phase velocities results in well-determined shear-velocity structures that are consistent with the compressional-wave structure, gravity, ... -
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Shallow geophysical survey across the Pahrump Valley Fault Zone, California-Nevada border
(2/1/1998)We employ seismic reflection, magnetics, and electromagnetics to locate precisely the southern extension of the Pahrump Valley Fault Zone (PVFZ) and examine its subsurface geometry. The southern extension of the PVFZ is ... -
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Improvements on Computation of Phase Velocities of Rayleigh Waves Based on the Generalized R/T Coefficient Method
(2/1/2008)Among many improvements on phase velocity computation of Rayleigh waves in a layered Earth model, the methods based on reflection and transmission (R/T) coefficients produce stable and accurate phase velocities for both ... -
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Validating Nevada ShakeZoning Predictions of Las Vegas Basin Response against 1992 Little Skull Mountain Earthquake Records
(2/1/2014)Over the last two years, the Nevada Seismological Laboratory has developed and refined Nevada ShakeZoning (NSZ) procedures to characterize earthquake hazards in the Intermountain West. Simulating the ML 5.6–5.8 Little Skull ... -
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Utilizing HyspIRI Prototype Data for Geological Exploration Applications: A Southern California Case Study
(2/24/2016)The purpose of this study was to demonstrate the value of the proposed Hyperspectral Infrared Imager (HyspIRI) instrument for geological mapping applications. HyspIRI-like data were collected as part of the HyspIRI airborne ... -
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Proof of concept: temperature-sensing waders for environmental sciences
(2/29/2016)A prototype temperature-sensing pair of waders is introduced and tested. The water temperature at the streambed is interesting both for scientists studying the hyporheic zone and for, e.g., fishers spotting good fishing ... -
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A seismic reflection image for the base of a tectonic plate
(2/5/2015)Plate tectonics successfully describes the surface of Earth as a mosaic of moving lithospheric plates. But it is not clear what happens at the base of the plates, the lithosphere–asthenosphere boundary (LAB). The LAB has ... -
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Estimating rates of debris flow entrainment from ground vibrations
(2015)Debris flows generate seismic waves as they travel downslope and can become more dangerous as they entrain sediment along their path. We present field observations that show a systematic relation between the magnitude of ...