Prior Probability

We set prior probability of each model parameter as the following table.

Model parameter	Distribution type	Tuning parameter
# of layer interfaces	Truncated uniform	$k_{min}$ , $k_{max}$
Interface depth	Truncated uniform	$z_{min}$ , $z_{max}$
S wave velocity perturbation	Gaussian	$\sigma_{\delta \beta,prior}$
P wave velocity perturbation	Gaussian
Data noise standard deviation	Truncated Uniform