Source rupture process of the 2018 Hokkaido Eastern Iburi earthquake deduced from strong-motion data considering seismic wave propagation in three-dimensional velocity structure

• 資料種別: 記事
• タイトル: Source rupture process of the 2018 Hokkaido Eastern Iburi earthquake deduced from strong-motion data considering seismic wave propagation in three-dimensional velocity structure
• 著者・編者: Kimiyuki Asano; Tomotaka Iwata
• 出版事項: 日本 : Springer Nature
• 出版年月日等: 2019-09-18
• 出版年（W3CDTF）: 2019-09-18
• タイトル（掲載誌）: EPS : Earth, Planets and Space
• 巻号年月日等（掲載誌）: 71(101)
• 掲載巻: 71(101)
• 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/s40623-019-1080-0; https://doi.org/10.1186/s40623-019-1080-0
• 国立国会図書館永続的識別子: info:ndljp/pid/11377526; https://dl.ndl.go.jp/pid/11377526
• コレクション（共通）: 障害者向け資料
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• コレクション（個別）: 国立国会図書館デジタルコレクション > 電子書籍・電子雑誌 > その他; https://dl.ndl.go.jp/collections/B00035
• 収集根拠: オンライン資料収集制度
• 受理日（W3CDTF）: 2019-10-28T20:45:15+09:00
• 保存日（W3CDTF）: 2019-10-28
• 記録形式（IMT）: application/pdf
• オンライン閲覧公開範囲: 国立国会図書館内限定公開
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• 遠隔複写可否（NDL）: 可
• 掲載誌（URI）: https://earth-planets-space.springeropen.com/articles
• 掲載誌（国立国会図書館永続的識別子）: info:ndljp/pid/11245705; https://dl.ndl.go.jp/pid/11245705
• 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 source rupture process of the 2018 Hokkaido Eastern Iburi earthquake (MJMA 6.7) was analyzed by a kinematic waveform inversion method using strong-motion data in 0.04–0.5 Hz. This earthquake occurred close to the Hidaka Collision Zone and the Ishikari depression, where the crustal structure is rather complex. Thus, we used a three-dimensional velocity structure model to compute the theoretical Green’s functions by the finite difference method. A source fault model with strike-angle variation was set based on the spatial distribution of the early aftershocks. The strong-motion stations used for the source inversion were selected based on the result of forward ground motion simulation of a moderate aftershock. The slip in the first 5 s was relatively small, but an area of significant slip with peak slip of 1.7 m was found in the depth range from 22 to 32 km. The rupture propagated upward mainly in the southwest direction. Based on the regional crustal structure and the configuration of the Moho discontinuity, the large-slip area was thought to be located in the lower crust, and its rupture did not reach the upper part of the continental crust. Most of the early aftershocks occurred around the large-slip area. The later aftershocks at the depth shallower than 20 km occurred outside the causative source fault of the mainshock. Three-dimensional ground motion simulation demonstrated that the heterogeneous source process and the three-dimensional basin and crustal velocity structure brought a large velocity pulse to an area to the southwest of the source fault, where the largest PGV was observed during the mainshock. The spatial distribution of the simulated PGV resembled the observed PGV distribution except some sites located inside the Ishikari depression where thick Quaternary soft low-velocity sediments exist at the top of the basin.
• DOI: 10.1186/s40623-019-1080-0; https://doi.org/10.1186/s40623-019-1080-0
• 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) 2019. 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/2433/244124; http://id.ndl.go.jp/digimeta/11377526; https://dl.ndl.go.jp/pid/11377526; http://link.springer.com/content/pdf/10.1186/s40623-019-1080-0.pdf; http://link.springer.com/article/10.1186/s40623-019-1080-0/fulltext.html
• 参照: Coseismic slip distribution of the 2024 Noto Peninsula earthquake deduced from dense global navigation satellite system network and interferometric synthetic aperture radar data: effect of assumed dip angle; https://cir.nii.ac.jp/crid/1050025098815015168; Along‐Dip Variation in Seismic Radiation of the 2011 Ibaraki‐Oki, Japan, Earthquake (<i>M</i>_w 7.9) Inferred Using a Multiple‐Period‐Band Source Inversion Approach; https://cir.nii.ac.jp/crid/1050567903436265472; Source rupture process of the MW 6.2 earthquake in the Noto Peninsula, central Japan, on May 5, 2023; https://cir.nii.ac.jp/crid/1360025430655195904; Groundwater Anomaly Related to CCS-CO2 Injection and the 2018 Hokkaido Eastern Iburi Earthquake in Japan; https://cir.nii.ac.jp/crid/1360290617790119552; 異なる手法による日本の地殻内地震の短周期レベルの比較; https://cir.nii.ac.jp/crid/1390295270227946880; 不均質震源断層モデルのすべり角のばらつき; https://cir.nii.ac.jp/crid/1390580384482555520; Prior and Real-Time Estimations of Geohazards Related to Earthquake and Volcanic Eruptions; https://cir.nii.ac.jp/crid/1390585172431100032; 2018年北海道胆振東部地震の広帯域震源モデルの改良と水平・上下動の再現; https://cir.nii.ac.jp/crid/1390848250132601216; Dynamic rupture simulation of 2018, Hokkaido Eastern Iburi earthquake : role of non-planar geometry; https://cir.nii.ac.jp/crid/2050307417119860864; Special issue “The 2018 Hokkaido Eastern Iburi Earthquake and Hidaka arc–arc collision system”; https://cir.nii.ac.jp/crid/2051714792003419776
• 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
• 書誌ID（NDLBibID）: 11377526; http://id.ndl.go.jp/bib/11377526
• NII論文ID: 120006724648