Florian Hofmann, California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA, United States, Devin McPhillips, U.S. Geological Survey, Pasadena, CA, United States, Katherine J Kendrick, U.S. Geological Survey, Earthquake Science Center, Pasadena, CA, United States and Kenneth A Farley, California Institute of Technology, Pasadena, CA, United States