Electronic Theses and Dissertations

Identifier

6716

Date

2021

Document Type

Thesis

Degree Name

Master of Science

Major

Earth Sciences

Concentration

Geophysics

Committee Member

Chris Cramer

Committee Member

Charles Langston

Committee Member

Christine Powell

Abstract

Near-surface shear-wave velocity (Vs) profiles and anelastic coefficients for Rayleigh- and Love-waves have been determined for three sites in Eastern Dyer County using short-range reflection/refraction experiments that recorded both the vertical and transverse components of seismic waves. The upper 10 meters for all sites display Vs ranging between 70 and 242 m s-1. The largest value for VSV is at the Johnson-Newbern site where velocity increases to 1500m s-1. The Pate site displays the highest VSH value at 800 m s-1. A predominately linear increas in velocity can be used to define this data. Average values of 5-50 for Qs explain the inability to complete seismic reflection profiling and may provide a new upper limit for attenuation in the shallow subsurface. The attenuation values and velocity profiles created as a result of this research should be considered in earthquake hazard assessments in the vicinity of the New Madrid Seismic Zone.

Comments

Data is provided by the student.

Library Comment

Dissertation or thesis originally submitted to the local University of Memphis Electronic Theses & dissertation (ETD) Repository.

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