*Ruby Connemara Marsden^1,7, Martin Danišík², Ung San Ahn³, Bjarne Friedrichs^4,5, Axel K Schmitt^2,4, Christopher L. Kirkland⁶, Bradley McDonald², Noreen J. Evans^2,7 (1.JSPS Postdoctoral Fellow, Kanazawa University, 2.John de Laeter Centre, Curtin University, Perth, Australia, 3.World Heritage Office, Jeju Special Self-Governing Provincial Government, 4.Institute of Earth Sciences, Heidelberg University, Germany, 5.Department of Environment and Biodiversity, Paris-Lodron-Universität Salzburg, Austria, 6.Timescales of Mineral Systems Group, The Institute for Geoscience Research (TIGeR), School of Earth and Planetary Sciences, Curtin University, Perth, Australia, 7.School of Earth and Planetary Sciences, Curtin University, Perth, Australia)

*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)

*Masataka Kawaguchi¹, Kenneth T Koga², Estelle F Rose-Koga³, Kenji Shimizu⁴, Takayuki Ushikubo⁴, Akira Yoshiasa⁵ (1.CWMD, Kumamoto University, 2.ISTO, Université d'Orléans, France, 3.ISTO, CNRS, France, 4.Institute of Core Sample Research, JAMSTEC, 5.Faculty of Advanced Science and Technology, Kumamoto University)

*Takahiro Miwa¹, Aika K Kurokawa², Masashi NAGAI¹, Tomofumi Kozono¹, Hideki Ueda¹, Toshikazu Tanada¹ (1.National research institute for earth science and disaster resilience, 2.Explosion Research Institute Inc)

*Vico Luthfi Ipmawan^1,2,4, Masato Iguchi², Takahiro Ohkura³, Takeshi Tameguri¹ (1.Earth and Planetary Science Division, Graduate School of Science, Kyoto University, 2.Sakurajima Volcano Research Center, Disaster Prevention Research Institute, Kyoto University, 3.Aso Volcanological Laboratory, Institute for Geothermal Sciences, Graduate School of Science, Kyoto University, 4.Physics Department, Institut Teknologi Sumatera)