Tomographic inversion of Mt.
St. Helens
Main Publication:
Lees, J.M., The magma
system of Mount St. Helens: Non-linear high resolution P-wave tomography, J.
Volc. Geoth. Res., 53 (1-4), 103-116 1992.
An earlier,
larger scale model (lower resolution)
was published in:
Lees, J.M.,
and R.S. Crosson, Tomographic inversion for three-dimensional velocity
structure at Mount St. Helens using earthquake data, J. Geophys. Res., 94
(B5), 5716-5728 1989.

This figure shows a vertical cross section of the inversion results with the line drawn model of Pallister et al.
Below are horizontal cross sections of the velocity model from 0-3.5 km depth.

