Figure 9
From: Anisotropic Rayleigh-wave phase velocities beneath northern Vietnam
Models obtained with various values for a given period of 40 s. Models obtained with various values of the isotropic norm-damping (a, b, c, d, e), isotropic smoothing (f, g, h, i, j), and smoothing of the anisotropic penalization (k, l, m, n, o) for a given period of 40 s. Images from the left to the right are calculated with increasing values of the parameters. The preferred values chosen for the final inversion can be found in pannels (c), (h), and (m).