Image crustal structure of eastern Oklahoma City with TOMODD
Abstract
There has been a dramatic increase in earthquake activity in Oklahoma since 2009. This dramatic increase was also matched by a marked increase in the number of operating seismic stations within the region. The additional stations include the Earthscope Transportable Arrays and temporary stations provided by the U. S. Geological Survey. The additional seismic stations and earthquakes provide the ability to do local travel time tomography of the crust within the region. For this study we are focusing on the area near the Jones earthquake swarm, that occurred just east of Oklahoma City, and the M5.6, November 2011 Prague earthquake. Major structures are already known in the area, but little is known about crustal structure below the top of the Precambrian basement. We used regionally available and temporary seismic stations along with more than 2000 earthquakes within the region to develop a 3D tomographic model of the crust using TOMODD. The major structures within the area are the Nemaha Ridge, Wilzetta Fault, and Seminole Uplift, and they and other structures as well are expressed within the tomographic model. We are working on determining the resolution and interpretation of the tomographic images.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2012
- Bibcode:
- 2012AGUFM.S41A2403C
- Keywords:
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- 7230 SEISMOLOGY / Seismicity and tectonics;
- 7270 SEISMOLOGY / Tomography