Date of Award
Master of Science
We present new 1-D and 3-D P- and S-wave velocity models for the active Charlevoix seismic zone (CSZ). The CSZ has generated several damaging earthquakes but the causative reason for the seismic activity in this intraplate region is unknown. Structure developed during prior tectonic events could be influencing present day seismic activity. Previous velocity models derived from local earthquake tomography utilize an overly simplistic half-space starting model. We develop improved 1-D P- and S-wave starting models using VELEST. These models contain several layers in the depth range 0 to 30 km and provide better starting models for 3-D inversion. Our new 3-D P- and S-wave velocity models contain several interesting anomalies that will provide insight into what factors influence earthquake occurrence in the CSZ. Relocated hypocenters outline the spatial extent of currently microseismically active seismogenic faults.
dissertation or thesis originally submitted to the local University of Memphis Electronic Theses & dissertation (ETD) Repository.
Kelemencky, Sara, "New 1-D and 3-D Velocity Models and Hypocenter Relocations for the Charlevoix Seismic Zone" (2013). Electronic Theses and Dissertations. 712.