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Tape C, Liu Q, Maggi A, et al. Adjoint tomography of the southern California crust. Science. 2009;325(5943):988-92doi: 10.1126/science.1175298.
Tape, C., Liu, Q., Maggi, A., & Tromp, J. (2009). Adjoint tomography of the southern California crust. Science (New York, N.Y.), 325(5943), 988-92. https://doi.org/10.1126/science.1175298
Tape, Carl, et al. "Adjoint tomography of the southern California crust." Science (New York, N.Y.) vol. 325,5943 (2009): 988-92. doi: https://doi.org/10.1126/science.1175298
Tape C, Liu Q, Maggi A, Tromp J. Adjoint tomography of the southern California crust. Science. 2009 Aug 21;325(5943):988-92. doi: 10.1126/science.1175298. PMID: 19696349.
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Science. 2009 Aug 21;325(5943):988-92. doi: 10.1126/science.1175298.

Adjoint tomography of the southern California crust.

Science (New York, N.Y.)

Carl Tape, Qinya Liu, Alessia Maggi, Jeroen Tromp

Affiliations

  1. Seismological Laboratory, California Institute of Technology, Pasadena, CA 91125, USA. [email protected]

PMID: 19696349 DOI: 10.1126/science.1175298

Abstract

Using an inversion strategy based on adjoint methods, we developed a three-dimensional seismological model of the southern California crust. The resulting model involved 16 tomographic iterations, which required 6800 wavefield simulations and a total of 0.8 million central processing unit hours. The new crustal model reveals strong heterogeneity, including local changes of +/-30% with respect to the initial three-dimensional model provided by the Southern California Earthquake Center. The model illuminates shallow features such as sedimentary basins and compositional contrasts across faults. It also reveals crustal features at depth that aid in the tectonic reconstruction of southern California, such as subduction-captured oceanic crustal fragments. The new model enables more realistic and accurate assessments of seismic hazard.

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