*Derek James Weller¹、Fidel Costa^2,3、Álvaro Amigo⁴、Jeffrey Oalmann^2,5 (1.National Institute of Advanced Industrial Science and Technology (AIST), Geologic Survey of Japan、2.Earth Observatory of Singapore, Nanyang Technological Univeristy、3.Institut de Physique du Globe de Paris (IPGP), Université de Paris、4.Servicio Nacional de Geología y Minería (SERNAGEOMIN)、5.Univeristy of Tasmania)