Subsurface Geometry of the San Andreas Fault in Southern California: Results from the Salton Seismic Imaging Project (SSIP) and Strong Ground Motion Expectations

G. S. Fuis; Klaus Bauer; M. Goldman; T. Ryberg; V. E. Langenheim; Daniel S. Scheirer; M. J. Rymer; Joann M. Stock; J. A. Hole; R. D. Catchings; Robert Graves; B. Aagaard

doi:10.1785/0120160309

July 4, 2017Bulletin of the Seismological Society of AmericaOpen Access

Subsurface Geometry of the San Andreas Fault in Southern California: Results from the Salton Seismic Imaging Project (SSIP) and Strong Ground Motion Expectations

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Key Points

To delineate the deep subsurface geometry of the southern San Andreas Fault system using active-source seismic imaging and evaluate its consequences for earthquake ground motion.
Conducted active-source seismic refraction and reflection profiling across the Salton Trough region as part of the Salton Seismic Imaging Project (SSIP).
Modeled crustal velocity structures and interface reflections to constrain non-vertical fault dips and structural variations at seismogenic depths.
Revealed pronounced non-vertical, dipping subsurface geometry along major segments of the southern San Andreas Fault rather than an idealized vertical fault plane.
Demonstrated that dipping fault geometries significantly bias the distribution and amplify the intensity of strong ground shaking across adjacent sedimentary basins.

Implication

Seismic imaging reveals the subsurface geometry of the southern San Andreas Fault, highlighting crucial implications for regional strong ground motion expectations.

Abstract

Author: Fuis, Gary S. et al.; Genre: Journal Article; Finally published : 2017; Open Access; Title: Subsurface Geometry of the San Andreas Fault in Southern California: Results from the Salton Seismic Imaging Project (SSIP)

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Fuis et al. (2017) studied this question.

synapsesocial.com/papers/6a9e4ee5e2d0fc9581be6579 https://doi.org/10.1785/0120160309

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Subsurface Geometry of the San Andreas Fault in Southern California: Results from the Salton Seismic Imaging Project (SSIP) and Strong Ground Motion Expectations

Key Points

Implication

Abstract

Discussion

Cite This Study

Subsurface Geometry of the San Andreas Fault in Southern California: Results from the Salton Seismic Imaging Project (SSIP) and Strong Ground Motion Expectations

Key Points

Implication

Abstract

Discussion

Cite This Study

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