Neotectonic structure in the central New Madrid seismic zone: Evidence from multimode seismic-reflection data

E.W. Woolery; R.L. Street; Z. Wang; J. B. Harris; J. McIntyre

doi:10.1785/gssrl.70.5.554

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Neotectonic structure in the central New Madrid seismic zone: Evidence from multimode seismic-reflection data

E.W. Woolery·R.L. Street·Z. Wang·J. B. Harris·J. McIntyre

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Abstract

Approximately 14.5 km of conventional P -wave and 2.2 km of horizontally polarized shear-wave seismic-reflection data acquired in the Kentucky Bend area of the central New Madrid Seismic Zone provide evidence of extensive neotectonic near-surface structure. The style and geometry of the deformation are consistent with documented historical geomorphic features, contemporary geomorphic features, and contemporary seismicity. The data image high-angle transpressional faults that strike between N30°W and N50°W. The fault planes exhibit apparent northeast and southwest dips. The opposing high-angle planes represent secondary splay or imbricate faults that responded to torsional bending of a lower-angle master fault.

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Seismological Research Letters Article

Source-reported bounding extent: 34.97625455391254° to 39.05611178818043° latitude; -91.56284334837352° to -87.99188939761103° longitude. This indicates report coverage, not an exact sampling location. View area on OpenStreetMap.

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E.W. Woolery, R.L. Street, Z. Wang, J. B. Harris, J. McIntyre. 1999. Neotectonic structure in the central New Madrid seismic zone: Evidence from multimode seismic-reflection data. https://doi.org/10.1785/gssrl.70.5.554

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