Inelastic strain rate in the seismogenic layer of Kyushu Island, Japan

• Material Type: 記事
• Title: Inelastic strain rate in the seismogenic layer of Kyushu Island, Japan
• Author/Editor: Satoshi Matsumoto; Takuya Nishimura; Takahiro Ohkura
• Publication, Distribution, etc.: 日本 : Springer science+business media
• Publication Date: 2016-12-28
• Publication Date (W3CDTF): 2016-12-28
• Periodical title: EPS : Earth, Planets and Space
• No. or year of volume/issue: 68(207)
• Volume: 68(207)
• ISSN (Periodical Title): 1880-5981
• ISSN-L (Periodical Title): 1343-8832
• Text Language Code: eng
• DOI: 10.1186/s40623-016-0584-0; https://doi.org/10.1186/s40623-016-0584-0
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• Date Accepted (W3CDTF): 2017-01-25T12:55:04+09:00
• Date Captured (W3CDTF): 2017-01-13
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• Summary, etc.: Seismic activity is associated with crustal stress relaxation, creating inelastic strain in a medium due to faulting. Inelastic strain affects the stress field around a weak body and causes stress concentration around the body, because the body itself has already released stress. Therefore, the understanding of inelastic deformation is important as it generates earthquakes. We investigated average inelastic strain in a spatial bin of Kyushu Island, Japan, and obtained the inelastic strain rate distribution associated with crustal earthquakes, based on the analysis of fault plane solutions and seismic moments. Large inelastic strains (>10-7 year-1) were found in the Beppu-Shimabara area, located in the center of Kyushu Island. The strain rate tensor was similar to that of the stress tensor except the absolute value in the area, implying that the inelastic strain was controlled by the stress field. The 2016 Kumamoto earthquake sequence (maximum magnitude 7.3) occurred in the Beppu-Shimabara area, with the major earthquakes located around the high inelastic strain rate area. Inelastic strain in the volume released the stress. In addition, the inelastic strain created an increment of stress around the volume. This indicates that the spatial heterogeneity of inelastic strain might concentrate stress.
• DOI: 10.1186/s40623-016-0584-0; https://doi.org/10.1186/s40623-016-0584-0
• Access Restrictions: インターネット公開
• Rights (production): © The Author(s) 2016. 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.
• Related Material (URI): http://hdl.handle.net/2433/218215; http://id.ndl.go.jp/digimeta/10267478; https://dl.ndl.go.jp/pid/10267478; http://link.springer.com/content/pdf/10.1186/s40623-016-0584-0.pdf; http://link.springer.com/article/10.1186/s40623-016-0584-0/fulltext.html
• Is Referenced By: Inelastic strain in the hypocentral region of the 2000 Western Tottori earthquake (M 7.3) inferred from aftershock seismic moment tensors; https://cir.nii.ac.jp/crid/1050867421579577216; Crustal Extension and Graben Formation by Fault Slip‐Associated Pore Opening, Kyushu, Japan; https://cir.nii.ac.jp/crid/1360004233292295808; Spatiotemporal Change in the Stress State Around the Hypocentral Area of the 2016 Kumamoto Earthquake Sequence; https://cir.nii.ac.jp/crid/1360011144524059776; Strain partitioning and interplate coupling along the northern margin of the Philippine Sea plate, estimated from Global Navigation Satellite System and Global Positioning System-Acoustic data; https://cir.nii.ac.jp/crid/1360285710979665536; Magmatic fluid pathways in the upper crust: insights from dense magnetotelluric observations around the Kuju Volcanoes, Japan; https://cir.nii.ac.jp/crid/1360298345525014656; Kinematic Source Modeling Using Radiation-Corrected Empirical Green’s Functions in Waveform Inversion; https://cir.nii.ac.jp/crid/1360306906078052096; Coseismic Groundwater Drawdown Along Crustal Ruptures During the 2016 M_w 7.0 Kumamoto Earthquake; https://cir.nii.ac.jp/crid/1360568468127407360; High-resolution image on terminus of fault rupture: relationship with volcanic hydrothermal structure; https://cir.nii.ac.jp/crid/1360588380590160768; The Advancement of Research on Inland Earthquake Generation 2014–2018; https://cir.nii.ac.jp/crid/1390283659860970112; 九州中部の第四紀テクトニクスからみた熊本地震; https://cir.nii.ac.jp/crid/1390845713072209024; Three-dimensional P- and S-wave attenuation structures around the source region of the 2016 Kumamoto earthquakes; https://cir.nii.ac.jp/crid/2051996266957067648; Electrical conductive fluid-rich zones and their influence on the earthquake initiation, growth, and arrest processes : observations from the 2016 Kumamoto earthquake sequence, Kyushu Island, Japan; https://cir.nii.ac.jp/crid/2051996266985497472
• References: Spatial heterogeneities in tectonic stress in Kyushu, Japan and their relation to a major shear zone; https://cir.nii.ac.jp/crid/1050282810809480960; Deformation of an island arc: Rates of moment release and crustal shortening in intraplate Japan determined from seismicity and Quaternary fault data; https://cir.nii.ac.jp/crid/1360011146458434816; A New Method for Determining First-Motion Focal Mechanisms; https://cir.nii.ac.jp/crid/1360292617917357824; Method for estimating the stress field from seismic moment tensor data based on the flow rule in plasticity theory; https://cir.nii.ac.jp/crid/1360848654735986944; Physics-based GPS data inversion to estimate three-dimensional elastic and inelastic strain fields; https://cir.nii.ac.jp/crid/1360855570637905408; A model with rigid rotations and slip deficits for the GPS-derived velocity field in Southwest Japan; https://cir.nii.ac.jp/crid/1361699993854604032; Late Quaternary to decadal velocity fields in Asia; https://cir.nii.ac.jp/crid/1361699993856718848; Enigmatic, highly active left-lateral shear zone in southwest Japan explained by aseismic ridge collision; https://cir.nii.ac.jp/crid/1364233269381564160; 表現定理とグリーン関数（2); https://cir.nii.ac.jp/crid/1390001204304205696; Three-dimensional seismic velocity structure as determined by double-difference tomography in and around the focal area of the 2005 West off Fukuoka Prefecture earthquake; https://cir.nii.ac.jp/crid/1390282681488738432; Spatial distribution of static stress drops for aftershocks of the 2005West Off Fukuoka Prefecture earthquake; https://cir.nii.ac.jp/crid/1390282681488743168; On volume-source representations based on the representation theorem; https://cir.nii.ac.jp/crid/2050588892145540608
• References (URI): https://cir.nii.ac.jp/crid/1370285711829277446
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