Erin Hightower, California Institute of Technology, Seismological Laboratory, Pasadena, CA, United States, Michael Gurnis, California Institute of Technology, Seismological Laboratory and Division of Geological and Planetary Sciences, Pasadena, CA, United States, Harm J Van Avendonk, University of Texas at Austin, Austin, TX, United States, Joann M Stock, California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA, United States, Sean P S Gulick, The University of Texas at Austin, Department of Geological Sciences, Austin, TX, United States and Rupert Sutherland, Victoria University of Wellington, Wellington, New Zealand