TY - JOUR
T1 - Subsurface fault geometries in Southern California illuminated through Full-3D Seismic Waveform Tomography (F3DT)
AU - Lee, En Jui
AU - Chen, Po
N1 - Funding Information:
The velocity models in this paper are available under Unified Community Velocity Model (UCVM) software framework (https://scec.usc.edu/scecpedia/UCVM_14.3.0). Figures used in this article were generated using the Generic Mapping Tools (GMT). This research was supported by the Southern California Earthquake Center (SCEC), which is funded by the National Science Foundation (cooperative agreement EAR-0109624) and U.S. Geological Survey (cooperative agreement 02HQAG0008). This research used resources of the Argonne Leadership Computing Facility at Argonne National Laboratory, which is supported by the Office of Science of the U.S. Department of Energy under contract DE-AC02-06CH11357. En-Jui Lee is supported by the Ministry of Science and Technology of Taiwan R.O.C. under contract MOST 104-2119-M-006-025. Po Chen is supported by the U.S. Geological Survey (award number: G10AP00032), the National Science Foundation (award number: 0944206), and the School of Energy Resources at University of Wyoming (start-up funds).
Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2017/4/22
Y1 - 2017/4/22
N2 - More precise spatial descriptions of fault systems play an essential role in tectonic interpretations, deformation modeling, and seismic hazard assessments. The recent developed full-3D waveform tomography techniques provide high-resolution images and are able to image the material property differences across faults to assist the understanding of fault systems. In the updated seismic velocity model for Southern California, CVM-S4.26, many velocity gradients show consistency with surface geology and major faults defined in the Community Fault Model (CFM) (Plesch et al. 2007), which was constructed by using various geological and geophysical observations. In addition to faults in CFM, CVM-S4.26 reveals a velocity reversal mainly beneath the San Gabriel Mountain and Western Mojave Desert regions, which is correlated with the detachment structure that has also been found in other independent studies. The high-resolution tomographic images of CVM-S4.26 could assist the understanding of fault systems in Southern California and therefore benefit the development of fault models as well as other applications, such as seismic hazard analysis, tectonic reconstructions, and crustal deformation modeling.
AB - More precise spatial descriptions of fault systems play an essential role in tectonic interpretations, deformation modeling, and seismic hazard assessments. The recent developed full-3D waveform tomography techniques provide high-resolution images and are able to image the material property differences across faults to assist the understanding of fault systems. In the updated seismic velocity model for Southern California, CVM-S4.26, many velocity gradients show consistency with surface geology and major faults defined in the Community Fault Model (CFM) (Plesch et al. 2007), which was constructed by using various geological and geophysical observations. In addition to faults in CFM, CVM-S4.26 reveals a velocity reversal mainly beneath the San Gabriel Mountain and Western Mojave Desert regions, which is correlated with the detachment structure that has also been found in other independent studies. The high-resolution tomographic images of CVM-S4.26 could assist the understanding of fault systems in Southern California and therefore benefit the development of fault models as well as other applications, such as seismic hazard analysis, tectonic reconstructions, and crustal deformation modeling.
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U2 - 10.1016/j.tecto.2017.03.005
DO - 10.1016/j.tecto.2017.03.005
M3 - Article
AN - SCOPUS:85015632275
VL - 703-704
SP - 42
EP - 49
JO - Tectonophysics
JF - Tectonophysics
SN - 0040-1951
ER -