Geomorphic features of surface ruptures associated with the 2016 Kumamoto earthquake in and around the downtown of Kumamoto City, and implications on triggered slip along active faults

• 資料種別: 記事
• タイトル: Geomorphic features of surface ruptures associated with the 2016 Kumamoto earthquake in and around the downtown of Kumamoto City, and implications on triggered slip along active faults
• 著者・編者: Hideaki Goto; Hiroyuki Tsutsumi; Shinji Toda
• 出版事項: 日本 : Springer Nature
• 出版年月日等: 2017-02-02
• 出版年（W3CDTF）: 2017-02-02
• タイトル（掲載誌）: EPS : Earth, Planets and Space
• 巻号年月日等（掲載誌）: 69(26)
• 掲載巻: 69(26)
• 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/s40623-017-0603-9; https://doi.org/10.1186/s40623-017-0603-9
• 国立国会図書館永続的識別子: info:ndljp/pid/10319677; https://dl.ndl.go.jp/pid/10319677
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• 収集根拠: オンライン資料収集制度
• 受理日（W3CDTF）: 2017-04-04T20:19:14+09:00
• 保存日（W3CDTF）: 2017-03-24
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• 掲載誌（国立国会図書館永続的識別子）: info:ndljp/pid/10319651; https://dl.ndl.go.jp/pid/10319651
• 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: The ~30-km-long surface ruptures associated with the M w 7.0 (M j 7.3) earthquake at 01:25 JST on April 16 in Kumamoto Prefecture appeared along the previously mapped ~100-km-long active fault called the Futagawa-Hinagu fault zone (FHFZ). The surface ruptures appeared to have extended further west out of the main FHFZ into the Kumamoto Plain. Although InSAR analysis by Geospatial Information Authority of Japan (GSI) indicated coseismic surface deformation in and around the downtown of Kumamoto City, the surface ruptures have not been clearly mapped in the central part of the Kumamoto Plain, and whether there are other active faults other than the Futagawa fault in the Kumamoto Plain remained unclear. We produced topographical stereo images (anaglyph) from 5-m-mesh digital elevation model of GSI, which was generated from light detection and ranging data. We interpreted them and identified that several SW-sloping river terraces formed after the deposition of the pyroclastic flow deposits related to the latest large eruption of the Aso caldera (86.8–87.3 ka) are cut and deformed by several NW-trending flexure scarps down to the southwest. These 5.4-km-long scarps that cut across downtown Kumamoto were identified for the first time, and we name them as the Suizenji fault zone. Surface deformation such as continuous cracks, tilts, and monoclinal folding associated with the main shock of the 2016 Kumamoto earthquake was observed in the field along the fault zone. The amount of vertical deformation (~0.1 m) along this fault associated with the 2016 Kumamoto earthquake was quite small compared to the empirically calculated coseismic slip (0.5 m) based on the fault length. We thus suggest that the slip on this fault zone was triggered by the Kumamoto earthquake, but the fault zone has potential to generate an earthquake with larger slip that poses a high seismic risk in downtown Kumamoto area.
• DOI: 10.1186/s40623-017-0603-9; https://doi.org/10.1186/s40623-017-0603-9
• 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) 2017. 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/2433/218658; http://id.ndl.go.jp/digimeta/10319677; https://dl.ndl.go.jp/pid/10319677; http://link.springer.com/content/pdf/10.1186/s40623-017-0603-9.pdf; http://link.springer.com/article/10.1186/s40623-017-0603-9/fulltext.html
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• 参照: Episodic growth of fault‐related fold in northern Japan observed by SAR interferometry; https://cir.nii.ac.jp/crid/1360011145365261056; Surface deformation due to shear and tensile faults in a half-space; https://cir.nii.ac.jp/crid/1360292621388170624; Slip on faults in the Imperial Valley triggered by the 4 April 2010 Mw 7.2 El Mayor-Cucapah earthquake revealed by InSAR; https://cir.nii.ac.jp/crid/1360574094194621312; Extensive Area of Topographic Anaglyphs Covering Inland and Seafloor Derived Using a Detailed Digital Elevation Model for Identifying Broad Tectonic Deformations; https://cir.nii.ac.jp/crid/1360855569727098752; Revised age and distribution of ca. 87ka Aso-4 tephra based on new evidence from the northwest Pacific Ocean; https://cir.nii.ac.jp/crid/1362825894543616000; 数値標高モデルのステレオ画像を用いた活断層地形判読; https://cir.nii.ac.jp/crid/1390001205324779264; 四国沖ピストンコア試料を用いたＡＴ火山灰噴出年代の再検討 タンデトロン加速器質量分析計による浮遊性有孔虫の｀１４´Ｃ年代; https://cir.nii.ac.jp/crid/1390001206235206528; 阿そカルデラ西ろくの活断層群と側火口の位置; https://cir.nii.ac.jp/crid/1390001206496840448; 熊本平野地下における第四系の最近１５万年間の沈降速度; https://cir.nii.ac.jp/crid/1390282681473536384; Small-displacement linear surface ruptures of the 2016 Kumamoto earthquake sequence detected by ALOS-2 SAR interferometry; https://cir.nii.ac.jp/crid/2050870366936052352; Continuity, segmentation and faulting type of active fault zones of the 2016 Kumamoto earthquake inferred from analyses of a gravity gradient tensor; https://cir.nii.ac.jp/crid/2051433316889475072
• 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）: 10319677; http://id.ndl.go.jp/bib/10319677
• NII論文ID: 120005997722