Resistivity characterisation of Hakone volcano, Central Japan, by three-dimensional magnetotelluric inversion

• 資料種別: 記事
• タイトル: Resistivity characterisation of Hakone volcano, Central Japan, by three-dimensional magnetotelluric inversion
• 著者・編者: Ryokei Yoshimura; Yasuo Ogawa; Yohei Yukutake
• 出版事項: 日本 : Springer Nature
• 出版年月日等: 2018-04-26
• 出版年（W3CDTF）: 2018-04-26
• タイトル（掲載誌）: EPS : Earth, Planets and Space
• 巻号年月日等（掲載誌）: 70(66)
• 掲載巻: 70(66)
• ISSN（掲載誌）: 1880-5981
• ISSN-L（掲載誌）: 1343-8832
• 本文の言語コード: eng
• DOI: 10.1186/s40623-018-0848-y; https://doi.org/10.1186/s40623-018-0848-y
• 国立国会図書館永続的識別子: info:ndljp/pid/11125833; https://dl.ndl.go.jp/pid/11125833
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• 受理日（W3CDTF）: 2018-08-10T20:26:03+09:00
• 保存日（W3CDTF）: 2018-08-10
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• 連携機関・データベース: 国立国会図書館 : 国立国会図書館デジタルコレクション; https://dl.ndl.go.jp

• 要約等: On 29 June 2015, a small phreatic eruption occurred at Hakone volcano, Central Japan, forming several vents in the Owakudani geothermal area on the northern slope of the central cones. Intense earthquake swarm activity and geodetic signals corresponding to the 2015 eruption were also observed within the Hakone caldera. To complement these observations and to characterise the shallow resistivity structure of Hakone caldera, we carried out a three-dimensional inversion of magnetotelluric measurement data acquired at 64 sites across the region. We utilised an unstructured tetrahedral mesh for the inversion code of the edge-based finite element method to account for the steep topography of the region during the inversion process. The main features of the best-fit three-dimensional model are a bell-shaped conductor, the bottom of which shows good agreement with the upper limit of seismicity, beneath the central cones and the Owakudani geothermal area, and several buried bowl-shaped conductive zones beneath the Gora and Kojiri areas. We infer that the main bell-shaped conductor represents a hydrothermally altered zone that acts as a cap or seal to resist the upwelling of volcanic fluids. Enhanced volcanic activity may cause volcanic fluids to pass through the resistive body surrounded by the altered zone and thus promote brittle failure within the resistive body. The overlapping locations of the bowl-shaped conductors, the buried caldera structures and the presence of sodium-chloride-rich hot springs indicate that the conductors represent porous media saturated by high-salinity hot spring waters. The linear clusters of earthquake swarms beneath the Kojiri area may indicate several weak zones that formed due to these structural contrasts.
• DOI: 10.1186/s40623-018-0848-y; https://doi.org/10.1186/s40623-018-0848-y
• オンライン閲覧公開範囲: インターネット公開
• 著作権情報: © The Author(s) 2018. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
• 関連情報（URI）: http://hdl.handle.net/2433/234196; http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100766171; http://id.ndl.go.jp/digimeta/11125833; https://dl.ndl.go.jp/pid/11125833; http://link.springer.com/content/pdf/10.1186/s40623-018-0848-y.pdf; http://link.springer.com/article/10.1186/s40623-018-0848-y/fulltext.html
• 参照: Estimation of spatial distribution and fluid fraction of a potential supercritical geothermal reservoir by magnetotelluric data: a case study from Yuzawa geothermal field, NE Japan; https://cir.nii.ac.jp/crid/1050573243559206016; Hydrothermal and Magmatic System of a Volcanic Island Inferred From Magnetotellurics, Seismicity, Self‐potential, and Thermal Image: An Example of Miyakejima (Japan); https://cir.nii.ac.jp/crid/1360013168773594880; Imaging the Source Region of the 2015 Phreatic Eruption at Owakudani, Hakone Volcano, Japan, Using High‐Density Audio‐Frequency Magnetotellurics; https://cir.nii.ac.jp/crid/1360572092600395648; Observing Posteruptive Deflation of Hydrothermal System Using InSAR Time Series Analysis: An Application of ALOS‐2/PALSAR‐2 Data on the 2015 Phreatic Eruption of Hakone Volcano, Japan; https://cir.nii.ac.jp/crid/1360576118752933376; Three‐Dimensional Seismic Attenuation Structure of Central Japan and Deep Sources of Arc Magmatism; https://cir.nii.ac.jp/crid/1361975843010047488; Significance of Electromagnetic Surveys at Active Volcanoes: Toward Evaluating the Imminence of Wet Eruptions; https://cir.nii.ac.jp/crid/1390001288144285440; 水蒸気噴火の発生場と噴火過程の観測; https://cir.nii.ac.jp/crid/1390009404771057536; Simple Graphical Pre- and Post-Processor for 3-D Magnetotelluric Inversion; https://cir.nii.ac.jp/crid/1390011461952313728; 箱根火山のマグマ・熱水系モデル; https://cir.nii.ac.jp/crid/1390290879752806016; 地表面変位から推定される箱根火山浅部熱水系の構造; https://cir.nii.ac.jp/crid/1390290879762529664; 2015年5月芦ノ湖北岸の群発地震活動; https://cir.nii.ac.jp/crid/1390298820574465536; Subsurface Resistivity Imaging of Nasudake (Chausudake) Volcano Determined from Time Domain Electromagnetic Survey (TDEM); https://cir.nii.ac.jp/crid/1390567172584338560; The Seismic Activity of the Nasudake Volcano Using Hypocenter Data (1998–2022) from the National Research Institute for Earth Science and Disaster Resilience; https://cir.nii.ac.jp/crid/1390579134185953792; Hydrothermal system of the active crater of Aso volcano (Japan) inferred from a three-dimensional resistivity structure model; https://cir.nii.ac.jp/crid/2050307417114050816; Anatomy of active volcanic edifice at the Kusatsu–Shirane volcano, Japan, by magnetotellurics : hydrothermal implications for volcanic unrests; https://cir.nii.ac.jp/crid/2050307417121625728; Volcanic unrest at Hakone volcano after the 2015 phreatic eruption : reactivation of a ruptured hydrothermal system?; https://cir.nii.ac.jp/crid/2050870367078669568
• 参照: Remotely triggered seismic activity in Hakone volcano during and after the passage of surface waves from the 2011 M9.0 Tohoku-Oki earthquake; https://cir.nii.ac.jp/crid/1360004232135308032; Resistivity structure and geochemistry of the Jigokudani Valley hydrothermal system, Mt. Tateyama, Japan; https://cir.nii.ac.jp/crid/1360004232342644864; 3-D inversion of magnetotelluric data using unstructured tetrahedral elements: applicability to data affected by topography; https://cir.nii.ac.jp/crid/1360011143803123968; Sensitivity studies applied to a two-dimensional resistivity model from the Central Andes; https://cir.nii.ac.jp/crid/1360011144854316928; New, improved version of generic mapping tools released; https://cir.nii.ac.jp/crid/1360292617909532032; A numerical evaluation of electromagnetic methods in geothermal exploration; https://cir.nii.ac.jp/crid/1360564064114162560; A magma‐hydrothermal system beneath Hakone volcano, central Japan, revealed by highly resolved velocity structures; https://cir.nii.ac.jp/crid/1360567179756104704; TetGen, a Delaunay-Based Quality Tetrahedral Mesh Generator; https://cir.nii.ac.jp/crid/1360574093826067072; Fluid-induced swarm earthquake sequence revealed by precisely determined hypocenters and focal mechanisms in the 2009 activity at Hakone volcano, Japan; https://cir.nii.ac.jp/crid/1360574094767838208; Fine fracture structures in the geothermal region of Hakone volcano, revealed by well-resolved earthquake hypocenters and focal mechanisms; https://cir.nii.ac.jp/crid/1360574094963358464; Three-dimensional resistivity structure of Asama Volcano revealed by data-space magnetotelluric inversion using unstructured tetrahedral elements; https://cir.nii.ac.jp/crid/1360848659520343680; A large hydrothermal reservoir beneath Taal Volcano (Philippines) revealed by magnetotelluric resistivity survey: 2D resistivity modeling; https://cir.nii.ac.jp/crid/1360855571382891008; A preparation zone for volcanic explosions beneath Naka-dake crater, Aso volcano, as inferred from magnetotelluric surveys; https://cir.nii.ac.jp/crid/1361981468444752384; Three-dimensional inversion of magnetotelluric impedance tensor data and full distortion matrix; https://cir.nii.ac.jp/crid/1361981470660937728; Analysis of rotational invariants of the magnetotelluric impedance tensor; https://cir.nii.ac.jp/crid/1362262944042476160; Magnetotellurics with a remote magnetic reference; https://cir.nii.ac.jp/crid/1362262944996489728; Resistivity characterization of the Krafla and Hengill geothermal fields through 3D MT inverse modeling; https://cir.nii.ac.jp/crid/1362262945627458560; Three‐dimensional joint inversion for magnetotelluric resistivity and static shift distributions in complex media; https://cir.nii.ac.jp/crid/1362825895323026816; Coseismic changes in the chemical composition of volcanic gases from the Owakudani geothermal area on Hakone volcano, Japan; https://cir.nii.ac.jp/crid/1363951795067911680; Two electrical conductors beneath Kusatsu-Shirane volcano, Japan, imaged by audiomagnetotellurics, and their implications for the hydrothermal system; https://cir.nii.ac.jp/crid/1390001206513720064; 箱根火山群，強羅付近の後カルデラ地質発達史; https://cir.nii.ac.jp/crid/1390282681216291968; Imaging the hydrothermal system beneath the Jigokudani valley, Tateyama volcano, Japan : implications for structures controlling repeated phreatic eruptions from an audio-frequency magnetotelluric survey; https://cir.nii.ac.jp/crid/2050870367116819712; Two-dimensional resistivity structure of Unzen Volcano revealed by AMT and MT surveys; https://cir.nii.ac.jp/crid/2051714792045290240; Analyzing the continuous volcanic tremors detected during the 2015 phreatic eruption of the Hakone volcano; https://cir.nii.ac.jp/crid/2051996266959879424
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• 書誌ID（NDLBibID）: 11125833; http://id.ndl.go.jp/bib/11125833
• NII論文ID: 120006582682; 120006510282