Focal mechanisms and stress field in the Nobi fault area, central Japan

• 資料種別: 記事
• タイトル: Focal mechanisms and stress field in the Nobi fault area, central Japan
• 著者・編者: Kei Katsumata; Masahiro Kosuga; Hiroshi Katao
• 出版事項: 日本 : Springer science+business media
• 出版年月日等: 2015-06-25
• 出版年（W3CDTF）: 2015-06-25
• タイトル（掲載誌）: EPS : Earth, Planets and Space
• 巻号年月日等（掲載誌）: 67(99)
• 掲載巻: 67(99)
• 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/s40623-015-0275-2; https://doi.org/10.1186/s40623-015-0275-2
• 国立国会図書館永続的識別子: info:ndljp/pid/9497178; https://dl.ndl.go.jp/pid/9497178
• コレクション（共通）: 障害者向け資料
• コレクション（障害者向け資料：レベル1）: テキストデータ
• 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）: 2015-09-15T20:13:28+09:00
• 保存日（W3CDTF）: 2015-08-20
• 記録形式（IMT）: application/pdf
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• デジタル化資料送信: 図書館・個人送信対象外
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• 掲載誌（URI）: https://www.earth-planets-space.com/content?page=1&itemsPerPage=100
• 掲載誌（国立国会図書館永続的識別子）: info:ndljp/pid/9227920; https://dl.ndl.go.jp/pid/9227920
• 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

• 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 > 学術機関 > 国立大学; https://dl.ndl.go.jp/collections/B00031
• オンライン閲覧公開範囲: インターネット公開
• 遠隔複写可否（NDL）: 不可
• 所蔵機関: 国立国会図書館
• 請求記号: Z22-1481
• 関連情報（URI）: http://dl.ndl.go.jp/info:ndljp/pid/9218063
• 関連情報（国立国会図書館永続的識別子）: info:ndljp/pid/9218063; http://dl.ndl.go.jp/info:ndljp/pid/9218063
• 連携機関・データベース: 国立国会図書館 : 国立国会図書館雑誌記事索引; https://ndlsearch.ndl.go.jp
• 書誌ID（NDLBibID）: 9497178; http://id.ndl.go.jp/bib/9497178
• 整理区分コード: 632

• 要約等: In this study, we obtained 728 focal mechanisms of small earthquakes with depths shallower than 20 km that occurred from May 2009 to May 2013 in the Nobi fault area in central Japan. The averages of the azimuths of the P- and T-axes were N97° ± 23° E and N6° ± 32° E, and the averages of the dips of the P- and T-axes were 11° ± 10° and 32° ± 25°, respectively. These variations in the P- and T-axes come from variation of the focal mechanisms; both strike-slip and reverse fault earthquakes were observed in the study area. A stress tensor inversion method was applied to the focal mechanisms, and we obtained and characterized the spatial pattern of the tectonic stress. We found that the maximum principal stress (σ <inf>1</inf>) is oriented E-W over almost the entire study area. The stress ratio R, which is defined as R = (σ <inf>1</inf> - σ <inf>2</inf>)/(σ <inf>1</inf> - σ <inf>3</inf>), ranges from 0.65 to 0.98, and the average R over the entire study area is 0.82. The average stress ratio is close to unity, indicating σ <inf>2</inf> ≈ σ <inf>3</inf>, and thus the dominant stress in this region is a uniaxial compression in the direction of σ <inf>1</inf>. The direction of the σ <inf>1</inf>-axis fluctuates locally at the southeastern end of the seismic fault ruptured by the 1891 Nobi earthquake. This fluctuation is limited to within a very narrow zone across the seismic fault in the upper crust shallower than approximately 10 km, suggesting that most of the deviatoric stress at the southeastern end of the seismic fault ruptured by the 1891 Nobi earthquake was not released.
• DOI: 10.1186/s40623-015-0275-2; https://doi.org/10.1186/s40623-015-0275-2
• 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: © 2015 Katsumata et al. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.
• 関連情報（URI）: http://hdl.handle.net/2433/212431; http://id.ndl.go.jp/digimeta/9497178; https://dl.ndl.go.jp/pid/9497178; http://link.springer.com/content/pdf/10.1186/s40623-015-0275-2.pdf; http://link.springer.com/article/10.1186/s40623-015-0275-2/fulltext.html; http://link.springer.com/content/pdf/10.1186/s40623-015-0275-2; http://hdl.handle.net/2115/59699
• 参照: Stability of the regional stress field in central Japan during the late Quaternary inferred from the stress inversion of the active fault data; https://cir.nii.ac.jp/crid/1050564285709667968; Dynamic rupture propagation during the 1891 Nobi, central Japan, earthquake: A possible extension to the branched faults; https://cir.nii.ac.jp/crid/1050564285755916032; Seismic moment of the 1891 Nobi, Japan, earthquake estimated from historical seismograms; https://cir.nii.ac.jp/crid/1050845760732626944; Free software helps map and display data; https://cir.nii.ac.jp/crid/1360011142940259072; Damped regional‐scale stress inversions: Methodology and examples for southern California and the Coalinga aftershock sequence; https://cir.nii.ac.jp/crid/1360011143898805504; Investigation of the stress‐concentration mechanism for intraplate earthquakes; https://cir.nii.ac.jp/crid/1360011145555288704; A New Method for Determining First-Motion Focal Mechanisms; https://cir.nii.ac.jp/crid/1360292617917357824; Earthquakes in Stable Continental Crust; https://cir.nii.ac.jp/crid/1360292621264703616; Change in stress field after the 2011 great Tohoku-Oki earthquake; https://cir.nii.ac.jp/crid/1360565165869625344; The weakened lower crust beneath the Nobi fault system, Japan: Implications for stress accumulation to the seismogenic zone; https://cir.nii.ac.jp/crid/1360567182476844800; Use of focal mechanisms to determine stress: A control study; https://cir.nii.ac.jp/crid/1360574093745283200; Maximum-likelihood estimation of hypocenter with origin time eliminated using nonlinear inversion technique; https://cir.nii.ac.jp/crid/1360855567865344128; Stressing of the New Madrid Seismic Zone by a lower crust detachment fault; https://cir.nii.ac.jp/crid/1360855570260722560; The 3-D tectonic stress fields in and around Japan inverted from centroid moment tensor data of seismic events; https://cir.nii.ac.jp/crid/1361981470084997632; Stress, strain, and mountain building in central Japan; https://cir.nii.ac.jp/crid/1362262945527211648; Stress field constraints on intraplate seismicity in eastern North America; https://cir.nii.ac.jp/crid/1362262945780276352; Intraplate seismicity, reactivation of preexisting zones of weakness, alkaline magmatism, and other tectonism postdating continental fragmentation; https://cir.nii.ac.jp/crid/1362544420176238336; Lithospheric strength and intraplate seismicity in the New Madrid seismic zone; https://cir.nii.ac.jp/crid/1363388843759125248; Local stress concentration in the seismic belt along the Japan Sea coast inferred from precise focal mechanisms: Implications for the stress accumulation process on intraplate earthquake faults; https://cir.nii.ac.jp/crid/1363670319923351680; Crustal stress field in southern California and its implications for fault mechanics; https://cir.nii.ac.jp/crid/1364233268388451072; Display and quantitative assessment of distributions of earthquake focal mechanisms; https://cir.nii.ac.jp/crid/1364233268817236480; Models for midcontinent tectonism: An Update; https://cir.nii.ac.jp/crid/1364233270058092160; Reexamination of the fault slip model of the 1891 M 8.0 Nobi earthquake : the first earthquake detected by a geodetic survey in Japan; https://cir.nii.ac.jp/crid/2050025942185030784; Spatial variation in coda Q around the Nobi fault zone, central Japan : relation to S-wave velocity and seismicity; https://cir.nii.ac.jp/crid/2050870367116803456; Examination of source fault model for the Gifu-Ichinomiya fault based on seismic intensity data; https://cir.nii.ac.jp/crid/2051433317068594432; Stress state in the upper crust around the source region of the 1891 Nobi earthquake through shear wave polarization anisotropy; https://cir.nii.ac.jp/crid/2051433317073003008
• 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）: 9497178; http://id.ndl.go.jp/bib/9497178
• NII論文ID: 120005756324