Fig. 5

Convergence process of prior densities, likelihoods, summation of logarithms of prior densities and likelihoods, and RMSs during the MCMC iteration. a, b are logarithm of prior densities for the gradient depth and the shallow gradients, respectively. c, d are logarithm of likelihoods for Eqs. 20 and 21, respectively. e is summation of (c) and (d). f is summation of (a), (b), and (e). g, h are RMSs of the projected travel time residuals for Eqs. 20 and 21, respectively