JpGU Meeting 2019
Session outline| Solid Earth Sciences (S) | ||
|---|---|---|
| Session Sub-category | Seismology (SS) | |
| Session ID | S-SS17 | |
| Title | Seismic evidence of volcanic roots | |
| Short Title | Seismic evidence of volcanic roots | |
| Main Convener | Name | Naofumi Aso |
| Affiliation | Tokyo Institute of Technology | |
| Co-Convener 1 | Name | Yohei Yukutake |
| Affiliation | Hot Springs Research Institute of Kanagawa Prefecture | |
| Session Language | J | |
| Scope | 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. | |
| Presentation Format | Oral and Poster presentation | |
| Invited Authors | Motoo Ukawa (Nihon University) Dapeng Zhao (Department of Geophysics, Tohoku University) | |
| Time | Presentation No | Title | Presenter | Abstract |
|---|---|---|---|---|
| Oral Presentation May 29 PM1 | ||||
| 13:45 - 14:00 | SSS17-01 | Spectral characteristics of deep low frequency earthquakes at Mount Fuji | Motoo Ukawa | |
| 14:00 - 14:15 | SSS17-02 | Deep low-frequency earthquakes corresponding to the 2011 and 2018 eruptions in Kirishima volcano | Ryo Kurihara | |
| 14:15 - 14:30 | SSS17-03 | Origin of long-duration of deep low-frequency earthquakes and activity of shallow low-frequency earthquakes beneath northeastern Japan | Masahiro Kosuga | |
| 14:30 - 14:45 | SSS17-04 | Deep low-frequency earthquakes, tomography and magmatic system beneath active volcanoes | Dapeng Zhao | |
| 14:45 - 15:00 | SSS17-05 | Seismic imaging of deep structure beneath active volcanoes | Junichi Nakajima | |
| 15:00 - 15:15 | SSS17-06 | Deep low-frequency volcanic earthquakes and their implication for deep crustal processes in the magmatic arc | Haruhisa Nakamichi | |
| Presentation No | Title | Presenter | Abstract |
|---|---|---|---|
| Poster Presentation May 29 PM2 | |||
| SSS17-P01 | S-wave reflectors beneath the earthquake swarm in the Yonezawa-Kitakata area, NE Japan | Manami Suzuki | |
| SSS17-P02 | Imaging of the magma pathway beneath Kirishima volcanoes by seismic interferometry | Yutaka Nagaoka | |
| SSS17-P03 | Finite element three-dimensional seismic waveform calculations of volcanic deep low frequency earthquake including true topographic effects of Hakone volcano | Lina Yamaya | |
| SSS17-P04 | Magma transport system beneath Hakone volcano inferred from deep low frequency earthquakes | Yohei Yukutake | |
| SSS17-P05 | Hypocenter and waveform characteristics of deep low-frequency earthquakes beneath Zao volcano | Takuma Ikegaya | |
| SSS17-P06 | Mechanisms transition of LFEs beneath Zao volcano due to the stress change induced by the 2011 Tohoku earthquake | Genki Oikawa | |
| SSS17-P07 | Magma/gas intrusion process of Shinmoedake Eruption in 2017 suggested by volcanic tremors location with ASL method | Makoto OKUBO | |
| 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 Mitsui | |