[S-SS17] Seismic evidence of volcanic roots

Wed. May 29, 2019 3:30 PM - 5:00 PM Poster Hall (International Exhibition Hall8, Makuhari Messe)

convener:Naofumi Aso(Tokyo Institute of Technology), Yohei Yukutake(Hot Springs Research Institute of Kanagawa Prefecture)

Magma transport system beneath volcanoes is a key to understand long-term geodynamics and the evolution of the Earth. Especially, deep long-period earthquakes around the Moho beneath active volcanoes are supposed to relate to the magma transport system, although their activities and mechanisms are not understood well. Revealing the role of deep long-period earthquakes in the magma transport system is a key to understand deep volcanic roots around the lower crust, including deep magma chambers. It is therefore essential to estimate complete seismicity with a high-resolution hypocenter distribution and focal mechanisms of deep long-period earthquakes, based on innovative techniques including template matching, relocation methods using waveform cross-correlations, and waveform inversions. Also, high-resolution seismic imaging using advanced tomography techniques, including tomography using ambient noise interferometry, with a dense seismic network is essential to visualize the magma transport system. We welcome studies to understand volcanic roots from a variety of seismological approaches including but not limited to the methods mentioned above.

[SSS17-P01] S-wave reflectors beneath the earthquake swarm in the Yonezawa-Kitakata area, NE Japan

*Manami Suzuki ¹, Akiko Hasemi¹, Tomomi Okada¹, Toru Matsuzawa¹, Norihito Umino¹, Takashi Nakayama¹, Noriko Tsumura², Tadashi Yamashina³, Group for the aftershock observations of the 2011 off the Pacific of Tohoku Earthquake (1.Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University, 2.Graduate School of Science, Chiba University, 3.Faculty of Science and Technology, Kochi University)

[SSS17-P02] Imaging of the magma pathway beneath Kirishima volcanoes by seismic interferometry

*Yutaka Nagaoka¹, Kiwamu Nishida², Yosuke Aoki², Minoru Takeo², Takahiro Ohkura³, Shin Yoshikawa³ (1.Volcanology Research Department, Meteorological Research Institute, 2.Earthquake Research Institute, The University of Tokyo, 3.Aso Volcanological Laboratory, Institute for Geothermal Sciences, Graduate School of Science, Kyoto University)

[SSS17-P03] Finite element three-dimensional seismic waveform calculations of volcanic deep low frequency earthquake including true topographic effects of Hakone volcano

*Lina Yamaya¹, Kimihiro Mochizuki¹, Tsuyoshi Ichimura¹, Kohei Fujita¹, Takeshi Akuhara¹, Takane Hori², Ryou Honda³, Yohei Yukutake³ (1.Earthquake Research Institute, Univ. of Tokyo, 2.JAMSTEC, 3.Hot Springs Research Institute of Kanagawa)

[SSS17-P04] Magma transport system beneath Hakone volcano inferred from deep low frequency earthquakes

*Yohei Yukutake¹, Yuki Abe¹ (1.Hot Springs Research Institute of Kanagawa Prefecture)

[SSS17-P05] Hypocenter and waveform characteristics of deep low-frequency earthquakes beneath Zao volcano

*Takuma Ikegaya¹, Mare Yamamoto¹ (1.Graduate School of Science, Tohoku University)

[SSS17-P06] Mechanisms transition of LFEs beneath Zao volcano due to the stress change induced by the 2011 Tohoku earthquake

*Genki Oikawa¹, Naofumi Aso¹, Junichi Nakajima¹, Toru Matsuzawa² (1.Tokyo Institute of Technology, 2.Tohoku University)

[SSS17-P07] Magma/gas intrusion process of Shinmoedake Eruption in 2017 suggested by volcanic tremors location with ASL method

Shoya Imamura¹, *Makoto OKUBO² (1.Faculty of Science, Kochi University, 2.Natural Science Cluster, Kochi University)

[SSS17-P08] Source depth estimation of a magmatic inflation in 2008-2010 at Mt. Fuji, Japan, based on sparsity-promoting L1 inversion of GNSS data

*Yuta Mitsui¹, Takahiro Kato² (1.Department of Geosciences, Shizuoka University, 2.formerly at Department of Geosciences, Shizuoka University)

Session information