MGDS References
Porritt, R.W., R.M. Allen, D.C. Boyarko and M.R. Brudzinski, "Investigation of Cascadia segmentation with ambient noise tomography", Earth and Planetary Science Letters, 309(1-2): 67-76, 2011, DOI 10.1016/j.epsl.2011.06.026. (View Reference)
