Refraction Microtremor (ReMi) Papers

Faster, Better: Shear-Wave velocity to 100 meters depth from refraction microtremor arrays - John Louie Paper describing the technique behind SeisOpt ReMi software analysis...click here for PDF version

Applying the refraction microtremor (ReMi) shear wave technique to geotechnical characterization - Michael L. Rucker Proceedings of the third international conference on the application of geophysical methodologies and NDT to transportation and infrastructure, December 8-12, 2003, Orlando, Florido, USA

Blind shear-wave velocity comparison of ReMi and MASW results with boreholes to 200m in Santa Clara Valley: Implications for earthquake ground motion assessment- W. J. Stephenson, J. N. Louie, S. Pullammanappallil, R. A. Williams, and J. K. Odum Bulletin of the Seismological Society of America, Vol 95., No 6, p. 2506-2516

Use of refraction microtremor (REMI) data for shear wave velocity determination at an urban bridge rehabilitation site - Douglas W. Lambert, Glen Adams, and Veronica Hawley Presented at the Geophysics 2006 conference, Dec 4-7th,2007, St. Louis, Missouri, USA

Characterizing potential 'bridging ground' conditions using the refraction microtremor (ReMi) surface seismic technique - Michael L. Rucker

Determination of 1-D shear wave velocities using the refraction microtremor method - Satish Pullammanappallil, Bill Honjas, and John Louie Proceedings of the third international conference on the application of geophysical methodologies and NDT to transportation and infrastructure, December 8-12, 2003, Orlando, Florido, USA

Comparative Study of the Refraction Microtremor (ReMi) Method: Using Seismic noise and standard P-wave refraction equipment for deriving 1-D S-wave profiles - Satish Pullammanappallil, Bill Honjas, John Louie, J. A. Siemens, and Hidetoshi Miura Presented at the 6th international SEG-J conference, Tokyo, Japan, January 2003

Esperienze Di Misura Vs30 Con la Tecnica Refraction Microtremor (ReMi) (in Italian) - Luigi Veronese and Tomas Garbari Convegno La Geofisca e La Nuova Normativa Sismica

Blind comparisons of shear-wave velocities at closely spaced sites in San Jose, California - U.S. Geological Survey, Open File Report 2005-1169 Version 1.0 Edited by Michael W. Asten and David M. Boore

Joint use of ReMi and Seismic Refraction (@2D/Pro)

Surface geophysics as tools for characterizing existing bridge foundations and scour conditions - Michael L. Rucker Presented at the Geophysics 2006 conference, Dec 4-7th,2007, St. Louis, Missouri, USA

Integrating seismic refraction and surface wave data collection and interpretation for geotechnical site characterization- Michael L. Rucker Presented at the Geophysics 2006 conference, Dec 4-7th, 2007, St. Louis, Missouri, USA

Surface-wave and refraction tomography at the FACT Site, Sandia National Laboratories, Alburquerque, New Mexico- Robert E. Abbott, Lewis C. Bartel, Bruce P. Engler, Satish Pullamannappallil

Seismic Refraction (@2D/Pro) Papers

A Generalized Simulated-Annealing Optimization for Inversion of First-Arrival Times - Satish Pullammanappallil and John Louie 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 having high multiplicity, as opposed to traditional refraction surveys with few shots...click here

Seismic refraction analysis of landslides - Charles F. Narwold and William P. Owen Proceedings of the Geophysics 2002 conference, April 15-19, 2002, Los Angeles, California

Seismic refraction interpretation with velocity gradient and depth of investigation - Michael L. Rucker Proceedings of the Geophysics 2002 conference, April 15-19, 2002, Los Angeles, California

The Northern Walker Lane Refraction Experiment: Pn Arrivals and the Northern Sierra Nevada Root- John N. Louie, Weston Thelen, Shane B. Smith, Jim B. Scott, Matthew Clark, Satish Pullammanappallil Tectonophysics, vol. 388, no. 1-4, p. 253-269

Velocity Models for the Highly Extended Crust of Death Valley, California - John Louie, Satish Pullammanappallil, and Bill Honjas We employ nonlinear optimization to obtain shallow velocity structure from COCORP seismic reflection profiles in the highly extended Death Valley region, California. We also use group-velocity analysis of regional earthquake surface waves that have traversed in and near the extended domain...click here

Seismic Reflection Papers

Inversion of seismic reflection traveltimes using a nonlinear optimization scheme - Satish Pullammanappallil and John Louie 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 equation computes reflection traveltimes through the velocity model and avoids raytracing. We test the optimization scheme on synthetic models and compare it with results from a linearized inversion...click here

A combined first-arrival travel time and reflection coherency optimization approach to velocity estimation - Satish Pullammanappallil and John Louie We present a nonlinear optimization method for two-dimensional velocity estimation in strongly heterogeneous media. We achieve this by designing a simulated-annealing algorithm to simultaneously maximize reflection coherency as well as minimize first-arrival travel time residuals...click here

Use of Advanced Data Processing Techniques in the Imaging of the Coso Geothermal Field - Satish Pullammanappalil, Bill Honjas, Jeff Unruh, and Frank Monastero During December of 1999, approximately 32 miles of seismic data were acquired within the Coso Geothermal Field, Inyo County, California, as part of a detailed seismic investigation undertaken by the US Navy Geothermal Program Office. Data acquisition was designed to make effective use of advaddnced data processing methods ...click here to download the pdf.

New Seismic Imaging of the Coso Geothermal Field, Eastern California - Jeff Unruh, Satish Pullammanappallil, Bill Honjas, and Frank Monastero New multifold seismic reflection data from the central Coso Range, eastern California, image brittle faults and other structures in Mesozoic crystalline rocks that host a producing geothermal field. The reflection data were processed in two steps that...click here to download the pdf.

Velocity Estimation from Earthquake Data

Inversion of travel time data for earthquake locations and three-dimensional velocity structure in the Eureka Valley area, eastern California - Abu M. Asad, Satish Pullammanappallil, Rasool Anooshehpoor, and John Louie We develop an earthquake travel time inversion methodology suitable for determining three-dimensional velocity structure and fault plane orientation for an area with little a priori information. Using a cascaded combination of a nonlinear simulated annealing optimization and linearized inversion, we investigate local three-dimensional compressional velocity structure and estimate the orientation of a fault plane in the Eureka Valley area of eastern California by inverting travel time data from a moderate earthquake sequence...click here

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