Department of Earth & Space Sciences, 595 Charles E. Young Drive East, 3806 Geology Building, Los Angeles, CA 90095, USA
Los Alamos National Laboratory, Earth and Environmental Sciences Div., EES-2/MS-F665, Los Alamos, NM 87545, USA
Department of Earth & Space Sciences, 595 Charles E. Young Drive East, 3806 Geology Building, Los Angeles, CA 90095, USA; Institute of Geophysics & Planetary Physics, University of California, Los Angeles, CA 90095, USA