Temporal variation in the resistivity structure of the first Nakadake crater, Aso volcano, Japan, during the magmatic eruptions from November 2014 to May 2015, as inferred by the ACTIVE electromagnetic monitoring system

• 資料種別: 記事
• タイトル: Temporal variation in the resistivity structure of the first Nakadake crater, Aso volcano, Japan, during the magmatic eruptions from November 2014 to May 2015, as inferred by the ACTIVE electromagnetic monitoring system
• 著者・編者: Takuto Minami; Mitsuru Utsugi; Hisashi Utada
• 出版事項: 日本 : Springer Nature
• 出版年月日等: 2018-08-23
• 出版年（W3CDTF）: 2018-08-23
• タイトル（掲載誌）: EPS : Earth, Planets and Space
• 巻号年月日等（掲載誌）: 70(138)
• 掲載巻: 70(138)
• 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/s40623-018-0909-2; https://doi.org/10.1186/s40623-018-0909-2
• 国立国会図書館永続的識別子: info:ndljp/pid/11189198; https://dl.ndl.go.jp/pid/11189198
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• 収集根拠: オンライン資料収集制度
• 受理日（W3CDTF）: 2018-11-22T14:07:23+09:00
• 保存日（W3CDTF）: 2018-11-21
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• 掲載誌（国立国会図書館永続的識別子）: info:ndljp/pid/11067456; https://dl.ndl.go.jp/pid/11067456
• 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: During the last magmatic eruption period of Aso volcano (November 2014 to May 2015), a controlled-source electromagnetic volcano monitoring experiment (ACTIVE) was conducted. Here, we interpret the temporal variations in the electromagnetic responses. The ACTIVE system installed at the first Nakadake crater, the only active crater of Aso, consisted of a transmitter located northwest of the crater and four (before the eruptions) or three (after the eruptions) vertical induction coil receiver stations. The ACTIVE system succeeded in detecting temporal variations in the resistivity structure during the latest magmatic eruption period. The response amplitude started to increase in November 2014, peaked in February 2015, and decreased slightly in August 2015. An unstructured tetrahedral finite element three-dimensional inversion that accounted for topographic effects was used to interpret temporal variations in the ACTIVE response. The 3-D inversion results revealed that temporal variations in the ACTIVE response are attributed mainly to (1) a broad increase in resistivity at elevations from 750 to 850 m, not only directly beneath the crater bottom but also outside the crater, and (2) a thin layer of decrease in resistivity at the elevation of ~ 1000 m on the western side of the crater. The increase in resistivity can be ascribed to a decrease in the amount of conductive groundwater in the upper part of an aquifer located below the elevation of 800 m, while the decrease in resistivity implies that enhanced fluid temperature and pressure changed the subsurface hydrothermal system and formed a temporal fluid reservoir at the shallow level during the magmatic eruption period.; 阿蘇山マグマ噴火に伴う地下熱水系時間変化の可視化に成功. 京都大学プレスリリース. 2018-08-23.
• DOI: 10.1186/s40623-018-0909-2; https://doi.org/10.1186/s40623-018-0909-2; 10.6084/m9.figshare.10037009; https://doi.org/10.6084/m9.figshare.10037009; 10.6084/m9.figshare.10037009.v1; https://doi.org/10.6084/m9.figshare.10037009.v1
• 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/2433/235325; http://id.ndl.go.jp/digimeta/11189198; https://dl.ndl.go.jp/pid/11189198; http://link.springer.com/article/10.1186/s40623-018-0909-2/fulltext.html; http://link.springer.com/content/pdf/10.1186/s40623-018-0909-2.pdf
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• 参照: Salt shell fallout during the ash eruption at the Nakadake crater, Aso volcano, Japan : evidence of an underground hydrothermal system surrounding the erupting vent; https://cir.nii.ac.jp/crid/1050282813184395136; Temporal variation in source location of continuous tremors before ash-gas emissions in January 2014 at Aso volcano, Japan; https://cir.nii.ac.jp/crid/1050564288161035904; Crustal magma pathway beneath Aso caldera inferred from 3-D electrical resistivity structure; https://cir.nii.ac.jp/crid/1050587981431089408; A water flow model of the active crater lake at Aso volcano, Japan: fluctuations of magmatic gas and groundwater fluxes from the underlying hydrothermal system; https://cir.nii.ac.jp/crid/1360002215319264000; 3D finite-element forward modeling of electromagnetic data using vector and scalar potentials and unstructured grids; https://cir.nii.ac.jp/crid/1360011143927650944; Occam's inversion; a practical algorithm for generating smooth models from electromagnetic sounding data; https://cir.nii.ac.jp/crid/1360282589150643200; The September 14, 2015 phreatomagmatic eruption of Nakadake first crater, Aso Volcano, Japan: Eruption sequence inferred from ballistic, pyroclastic density current and fallout deposits; https://cir.nii.ac.jp/crid/1360283691033903360; Three-dimensional seismic velocity structure beneath Aso Volcano, Kyushu, Japan; https://cir.nii.ac.jp/crid/1360292621405215744; Ash eruption of the Naka-dake crater, Aso volcano, southwestern Japan; https://cir.nii.ac.jp/crid/1360292621572696064; Three-dimensional resistivity structure of Asama Volcano revealed by data-space magnetotelluric inversion using unstructured tetrahedral elements; https://cir.nii.ac.jp/crid/1360848659520343680; ACTIVE system for monitoring volcanic activity: A case study of the Izu-Oshima Volcano, Central Japan; https://cir.nii.ac.jp/crid/1360855569265662336; Laboratory measurements of electrical conductivity of hydrous and dry silicic melts under pressure; https://cir.nii.ac.jp/crid/1360855571405686272; Finite element based inversion for time-harmonic electromagnetic problems; https://cir.nii.ac.jp/crid/1361137044602725376; A preparation zone for volcanic explosions beneath Naka-dake crater, Aso volcano, as inferred from magnetotelluric surveys; https://cir.nii.ac.jp/crid/1361981468444752384; Edge‐based finite element approach to the simulation of geoelectromagnetic induction in a 3‐D sphere; https://cir.nii.ac.jp/crid/1363107370057749248; Resistivity structure of Unzen Volcano derived from time domain electromagnetic (TDEM) survey; https://cir.nii.ac.jp/crid/1363388846037457792; Electrical Conductivity Models of the Crust and Mantle; https://cir.nii.ac.jp/crid/1363951793253235200; Aso94: Aso seismic observation with broadband instruments; https://cir.nii.ac.jp/crid/1364233268644307328; Detection of a crack‐like conduit beneath the active crater at Aso Volcano Japan; https://cir.nii.ac.jp/crid/1364233271132968960; 2014年11月から始まった阿蘇火山中岳第一火口の噴火活動; https://cir.nii.ac.jp/crid/1390282679281247488; Three-dimensional magnetotelluric: data space method; https://cir.nii.ac.jp/crid/1572261551242659200
• 連携機関・データベース: 国立情報学研究所 : CiNii Research; https://cir.nii.ac.jp/
• 提供元機関・データベース: 学術機関リポジトリデータベース; https://irdb.nii.ac.jp; 雑誌記事索引データベース; https://ndlsearch.ndl.go.jp; Crossref; https://www.crossref.org; CiNii Articles; 科学研究費助成事業データベース; https://kaken.nii.ac.jp/ja
• 書誌ID（NDLBibID）: 11189198; http://id.ndl.go.jp/bib/11189198
• NII論文ID: 120006540176