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Proceedings Paper

Surface-wave-based inversions of shallow seismic structure
Author(s): Gregg D. Larson; Mubashir Alam; James S. Martin; Waymond R. Scott Jr.; James H. McClellan; George S. McCall II; Pelham D. Norville; Benjamin Declety
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Paper Abstract

The inversion of surface wave propagation measurements to determine soil properties within a few meters of the surface is being investigated to facilitate the development and simulation of seismic landmine detection techniques. Knowledge of soil types, soil material properties, inhomogeneities, stratification, water content, and nonlinear mechanisms in both the propagation path and the source-to-surface coupling can be used to validate and improve both numerical and experimental models. The determination of the material properties at field test sites is crucial for the continued development of numerical models, which have shown a strong dependency on the assumed soil parameter variations in elastic moduli and density as a function of depth. Field experiments have been conducted at several test sites using both surface and sub-surface sensors to measure the propagation of elastic waves in situ with minimal disruption of the existing soil structure. Material properties have been determined from inversion of surface wave measurements using existing spectral analysis of surface waves (SASW) techniques. While SASW techniques are computer-intensive, they do not disturb the existing soil structure during testing as do borehole and trench techniques. Experimental data have been compared to results from 3-D finite-difference time-domain (FDTD) modeling of similar soil structures and measurement methods.

Paper Details

Date Published: 11 September 2003
PDF: 12 pages
Proc. SPIE 5089, Detection and Remediation Technologies for Mines and Minelike Targets VIII, (11 September 2003); doi: 10.1117/12.487474
Show Author Affiliations
Gregg D. Larson, Georgia Institute of Technology (United States)
Mubashir Alam, Georgia Institute of Technology (United States)
James S. Martin, Georgia Institute of Technology (United States)
Waymond R. Scott Jr., Georgia Institute of Technology (United States)
James H. McClellan, Georgia Institute of Technology (United States)
George S. McCall II, Georgia Institute of Technology (United States)
Pelham D. Norville, Georgia Institute of Technology (United States)
Benjamin Declety, Georgia Institute of Technology (United States)


Published in SPIE Proceedings Vol. 5089:
Detection and Remediation Technologies for Mines and Minelike Targets VIII
Russell S. Harmon; John H. Holloway Jr.; J. T. Broach, Editor(s)

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