Fault Orientation in the Eastern Tennessee Seismic Zone: A Study Using the Double-Difference Earthquake Location Algorithm

Other| July 01, 2006 Fault Orientation in the Eastern Tennessee Seismic Zone: A Study Using the Double-Difference Earthquake Location Algorithm Meredith M. Dunn; Meredith M. Dunn Center for Earthquake Research and Information The University of Memphis 3876 Central Ave. Memphis, Tennessee 38152 mmdunn@memphis.edu (M.M.D.) Search for other works by this author on: GSW Google Scholar Martin C. Chapman Martin C. Chapman Department of Geosciences Virginia Polytechnic Institute and State University 4044 Derring Hall Blacksburg, Virginia 24061 mcc@vt.edu (M.C.C.) Search for other works by this author on: GSW Google Scholar Author and Article Information Meredith M. Dunn Center for Earthquake Research and Information The University of Memphis 3876 Central Ave. Memphis, Tennessee 38152 mmdunn@memphis.edu (M.M.D.) Martin C. Chapman Department of Geosciences Virginia Polytechnic Institute and State University 4044 Derring Hall Blacksburg, Virginia 24061 mcc@vt.edu (M.C.C.) Publisher: Seismological Society of America First Online: 09 Mar 2017 Online ISSN: 1938-2057 Print ISSN: 0895-0695 © 2006 by the Seismological Society of America Seismological Research Letters (2006) 77 (4): 494–504. https://doi.org/10.1785/gssrl.77.4.494 Article history First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Tools Icon Tools Get Permissions Search Site Citation Meredith M. Dunn, Martin C. Chapman; Fault Orientation in the Eastern Tennessee Seismic Zone: A Study Using the Double-Difference Earthquake Location Algorithm. Seismological Research Letters 2006;; 77 (4): 494–504. doi: https://doi.org/10.1785/gssrl.77.4.494 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 We use the double-difference earthquake location algorithm to relocate approximately 1,000 earthquakes in the eastern Tennessee seismic zone (ETSZ). We examine the earthquake hypocenter relocations in an effort to resolve fault orientations and thereby gain insights into the tectonics of the seismic zone. The analysis involves visual comparison of three-dimensional perspective plots of the hypocenter relocations oriented according to focal mechanism nodal planes derived from events within several clusters of earthquakes.Relocations in the central, most seismically active, portion of the ETSZ indicate a diffuse west-striking, north-dipping zone of hypocenters. The orientation of this zone of hypocenters is consistent with structure imaged by a previous seismic reflection profile that shows a reflective mid-to-upper crust with apparent dips of approximately 35° to the north. Relocation of a smaller cluster of earthquakes near the Tennessee-North Carolina border suggests a steeply dipping northwest trending fault in that area. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.