Peter McNeil Chutcharavan, University of Florida, Geological Sciences, Ft Walton Beach, FL, United States, Andrea Dutton, University of Wisconsin Madison, Geoscience, Madison, WI, United States, Robert E Kopp, Rutgers University New Brunswick, Institute of Earth, Ocean, and Atmospheric Sciences, New Brunswick, NJ, United States, Erica Ashe, Rutgers University New Brunswick, New Brunswick, NJ, United States and Jerry X Mitrovica, Harvard University, Department of Earth and Planetary Sciences, Cambridge, MA, United States