This is an interactive site to view the vertical and horizontal cross sections of the tomographic model from the PhD thesis of Carl Tape.
For details, see "Adjoint tomography of the southern California crust" (Science, v. 325, p. 988-992), by Carl Tape, Qinya Liu, Alessia Maggi, and Jeroen Tromp.
The study used earthquake simulations such as the ones used by ShakeMovie.
The wave-speed values at the gridpoints used in the simulation can be downloaded from Carl's PhD thesis page.
Cursor Lon, Lat
Select a depth from the list to see the tomographic model for that cross section.