*James C Sample¹、Xianfeng Wang⁵、Sarah Weeks¹、Ana Crespo-Blanc³、Yuzuru Yamamoto⁴、Gregory Jesmok²、William Defliese²、Aradhna Tripati² (1.School of Earth Sciences and Enviromental Sciences, N. Arizona Univ, Flagstaff, Arizona, USA、2.Dept. Earth, Planetary, and Space Sciences UCLA, Los Angeles, California, USA、3.Dept. Geodynamics, Univ Granada, Granada, Spain、4.Dept. Mathematical Science and Advanced Technology, JAMSTEC、5.Earth Observatory of Singapore, Nanyang Tech Univ, Singapore)