TY - JOUR
T1 - Resonant frequency derived from the rayleigh-wave dispersion image
T2 - The high-impedance boundary problem
AU - Liberty, Lee M.
AU - St. Clair, James
AU - Mikesell, T. Dylan
AU - Schermerhorn, William D.
N1 - Publisher Copyright:
© Seismological Society of America.
PY - 2021/2
Y1 - 2021/2
N2 - We present a simple and automated approach to estimate primary site-response resonance, layer thickness, and shear-wave velocity directly from a dispersion image for a layer over half-space problem. We demonstrate this for high-impedance boundary conditions that lie in the upper tens of meters. Our approach eliminates the need for time-consuming dispersion curve picking and 1D shear-wave velocity inversion for large data volumes that can capture velocity structure in profile. We highlight important relationships between dispersion characteristics and resonance parameters through synthetic modeling and field data acquired over Atlantic Coastal Plain sediments. In this environment, shallow soil conditions are critical to accurately estimate earthquake site response. We suggest that this image processing approach can be applied to a range of high-impedance conditions, at a range of scales, or can provide model constraints for more complex velocity structures.
AB - We present a simple and automated approach to estimate primary site-response resonance, layer thickness, and shear-wave velocity directly from a dispersion image for a layer over half-space problem. We demonstrate this for high-impedance boundary conditions that lie in the upper tens of meters. Our approach eliminates the need for time-consuming dispersion curve picking and 1D shear-wave velocity inversion for large data volumes that can capture velocity structure in profile. We highlight important relationships between dispersion characteristics and resonance parameters through synthetic modeling and field data acquired over Atlantic Coastal Plain sediments. In this environment, shallow soil conditions are critical to accurately estimate earthquake site response. We suggest that this image processing approach can be applied to a range of high-impedance conditions, at a range of scales, or can provide model constraints for more complex velocity structures.
UR - http://www.scopus.com/inward/record.url?scp=85100512185&partnerID=8YFLogxK
U2 - 10.1785/0120200230
DO - 10.1785/0120200230
M3 - Article
AN - SCOPUS:85100512185
SN - 0037-1106
VL - 111
SP - 77
EP - 86
JO - Bulletin of the Seismological Society of America
JF - Bulletin of the Seismological Society of America
IS - 1
ER -