Near-surface Vs Profiling in the New Madrid Seismic Zone Using Surface-wave Methods

Other| May 01, 2002 Near-surface Vs Profiling in the New Madrid Seismic Zone Using Surface-wave Methods Glenn J. Rix; Glenn J. Rix Georgia Institute of Technology School of Civil and Environmental Engineering Atlanta, GA 30332-0355 glenn.rix@ce.gatech.edu Search for other works by this author on: GSW Google Scholar Gregory L. Hebeler; Gregory L. Hebeler Georgia Institute of Technology School of Civil and Environmental Engineering Atlanta, GA 30332-0355 glenn.rix@ce.gatech.edu Search for other works by this author on: GSW Google Scholar M. Catalina Orozco M. Catalina Orozco Georgia Institute of Technology School of Civil and Environmental Engineering Atlanta, GA 30332-0355 glenn.rix@ce.gatech.edu Search for other works by this author on: GSW Google Scholar Seismological Research Letters (2002) 73 (3): 380–392. https://doi.org/10.1785/gssrl.73.3.380 Article history first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Glenn J. Rix, Gregory L. Hebeler, M. Catalina Orozco; Near-surface Vs Profiling in the New Madrid Seismic Zone Using Surface-wave Methods. Seismological Research Letters 2002;; 73 (3): 380–392. doi: https://doi.org/10.1785/gssrl.73.3.380 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietySeismological Research Letters Search Advanced Search Abstract Surface-wave tests were performed at eleven sites in Shelby County and Memphis, Tennessee and northeast Arkansas representing soil deposits of differing types and ages to determine near-surface shear-wave velocity (Vs) profiles for site-response analyses. Active surface-wave tests were conducted using a harmonic source and an irregular linear array of receivers. At two of the eleven sites, a two-dimensional array of receivers was used to record surface waves generated by passive sources including microtremors and cultural noise. Dispersion curves for both types of tests were calculated using frequency-wavenumber methods and were inverted using an algorithm that encourages smoothness of the resulting Vs profile. The surface-wave test results compare well with profiles obtained by other researchers using a variety of methods. We believe that most observed differences are due to the nature of surface-wave propagation and the characteristics of the inversion algorithm. At the Mud Island B site, we obtained a profile to a depth of 170 m by combining active and passive dispersion data to form a composite dispersion curve. The combination of active and passive data significantly enhances the capabilities of surface-wave test procedures. Finally, the measured Vs profiles were used to calculate linear amplification spectra, which clearly indicate differences in site response between Holocene- and Pleistocene-age deposits. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.