Yehuda Bock¹, Emilie Klein², Angelyn W Moore³, Xiaohua Xu¹, David T Sandwell¹ and Peng Fang¹, (1)Scripps Institution of Oceanography, Institute of Geophysics and Planetary Physics, La Jolla, CA, United States, (2)Laboratoire de Géologie, ENS, CNRS, UMR 8538, PSL Research University, Paris, France, (3)Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States