CVM Toolkit

The SCEC Community Velocity Model Toolkit (CVM-T) enables earthquake modelers to quickly build, visualize, and validate large-scale meshes using SCEC CVM-H or CVM-4. CVM-T is comprised of three main components:

• An updated community velocity model for Southern California based on SCEC CVM-H
• Tools for extracting 3D regular meshes from this model and visualizing them
• An automated test framework for evaluating new releases of CVMs using SCEC’s AWP-ODC forward wave propagation software and one, or more, ground motion goodness of fit (GoF) algorithms.

Trac Sites

• CVM-H https://intensity.usc.edu/trac/cvmh/
• cvm2mesh
• viz-cvm
• cvmtest

References

• Suess, M. P., and J. H. Shaw, 2003: P-wave seismic velocity structure derived from sonic logs and industry reflection data in the Los Angeles basin, California, Journal of Geophysical Research, 108/B3.
• Plesch, A., C. Tape, J. H. Shaw, and members of the USR working group, 2009, CVM-H 6.0: Inversion integration, the San Joaquin Valley and other advances in the community velocity model, in 2009 Southern California Earthquake Center Annual Meeting, Proceedings and Abstracts, vol. 19, pp. 260–261.
• Tape, C., Q. Liu, A. Maggi, and J. Tromp, 2009: Adjoint tomography of the southern California crust, Science, v. 325, p. 988-992.
• Magistrale, H., S. Day, R. W. Clayton, and R. Graves, 2000: The SCEC southern California reference 3D seismic velocity model Version 2, Bull. Seismol. Soc. Am., v. 90, no. 6B, p. S65-S76
• Ely, G., 2010: Vs30 Derived GTL, TBD