{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1361137044986287488.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1029/2005jb004016"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2005JB004016"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2005JB004016"}}],"dc:title":[{"@value":"Imaging the seismic structure and stress field in the source region of the 2004 mid‐Niigata prefecture earthquake: Structural zones of weakness and seismogenic stress concentration by ductile flow"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>We deployed a dense temporal seismic network in the source region of the 2004 mid‐Niigata prefecture earthquake (thrust fault), Japan. A detailed velocity structure and accurate aftershock distributions were elucidated by inverting aftershock arrival times using double‐difference tomography. A stress tensor inversion using the first‐motion data was also conducted in order to investigate the stress field. The seismic velocities in the hanging wall above the main shock fault are lower than those in the footwall, with the velocity contrast extending to a depth of approximately 10 km. The aftershocks along the main shock rupture zone are distributed around the sharp boundary between the low‐ and high‐velocity bodies. Furthermore, aftershocks associated with the largest aftershock appear to be aligned on a boundary between low‐ and high‐velocity zones, in the footwall. The orientation of maximum principal stress (σ<jats:sub>1</jats:sub>) is consistent with the regional compressional strain rate axis inferred from GPS data, except in the southwestern side of the main shock hypocenter where the azimuth of σ<jats:sub>1</jats:sub> rotates approximately 20° counterclockwise. The main shock hypocenter was located roughly at the transition zone where the structure of the hanging wall changes laterally and the azimuth of σ<jats:sub>1</jats:sub> rotates. Heterogeneous structures of the seismic velocity and the stress field, combined with the ductile deformation of the upper crust, may have concentrated seismogenic stress around the hypocenter area to cause the complex distributions of aftershock sequence on structural boundaries.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1381137044986287488","@type":"Researcher","foaf:name":[{"@value":"Aitaro Kato"}],"jpcoar:affiliationName":[{"@value":"Earthquake Research Institute University of Tokyo  Tokyo Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381137044986287616","@type":"Researcher","foaf:name":[{"@value":"Shin'ichi Sakai"}],"jpcoar:affiliationName":[{"@value":"Earthquake Research Institute University of Tokyo  Tokyo Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381137044986287619","@type":"Researcher","foaf:name":[{"@value":"Naoshi Hirata"}],"jpcoar:affiliationName":[{"@value":"Earthquake Research Institute University of Tokyo  Tokyo Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381137044986287489","@type":"Researcher","foaf:name":[{"@value":"Eiji Kurashimo"}],"jpcoar:affiliationName":[{"@value":"Earthquake Research Institute University of Tokyo  Tokyo Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381137044986287618","@type":"Researcher","foaf:name":[{"@value":"Takashi Iidaka"}],"jpcoar:affiliationName":[{"@value":"Earthquake Research Institute University of Tokyo  Tokyo Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1420282801200163968","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"70151719"},{"@type":"NRID","@value":"1000070151719"},{"@type":"NRID","@value":"9000254753796"},{"@type":"NRID","@value":"9000254262888"},{"@type":"NRID","@value":"9000254270741"},{"@type":"NRID","@value":"9000254741760"},{"@type":"NRID","@value":"9000004602253"},{"@type":"NRID","@value":"9000410904541"},{"@type":"NRID","@value":"9000413694882"},{"@type":"NRID","@value":"9000254753595"},{"@type":"NRID","@value":"9000410949604"},{"@type":"NRID","@value":"9000254270803"},{"@type":"NRID","@value":"9000400157697"},{"@type":"NRID","@value":"9000000774168"},{"@type":"NRID","@value":"9000391405458"},{"@type":"NRID","@value":"9000254753522"},{"@type":"NRID","@value":"9000254263101"},{"@type":"NRID","@value":"9000001755402"},{"@type":"NRID","@value":"9000254262834"},{"@type":"NRID","@value":"9000410949332"},{"@type":"NRID","@value":"9000403549786"},{"@type":"NRID","@value":"9000283228254"},{"@type":"NRID","@value":"9000391402104"},{"@type":"NRID","@value":"9000391405187"},{"@type":"NRID","@value":"9000410949812"},{"@type":"NRID","@value":"9000254753590"},{"@type":"NRID","@value":"9000403551953"},{"@type":"NRID","@value":"9000258411897"},{"@type":"NRID","@value":"9000254271201"},{"@type":"NRID","@value":"9000254741494"},{"@type":"NRID","@value":"9000017413614"},{"@type":"NRID","@value":"9000254753539"},{"@type":"NRID","@value":"9000254262969"},{"@type":"NRID","@value":"9000254270771"},{"@type":"NRID","@value":"9000410949853"},{"@type":"NRID","@value":"9000410948881"},{"@type":"NRID","@value":"9000254262818"},{"@type":"NRID","@value":"9000254270790"},{"@type":"NRID","@value":"9000258415648"},{"@type":"NRID","@value":"9000004598565"},{"@type":"NRID","@value":"9000254740635"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/iwasaki-t"}],"foaf:name":[{"@value":"Takaya Iwasaki"}],"jpcoar:affiliationName":[{"@value":"Earthquake Research Institute University of Tokyo  Tokyo Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381137044986287620","@type":"Researcher","foaf:name":[{"@value":"Toshihiko Kanazawa"}],"jpcoar:affiliationName":[{"@value":"Earthquake Research Institute University of Tokyo  Tokyo Japan"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"01480227"}],"prism:publicationName":[{"@value":"Journal of Geophysical Research: Solid Earth"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2006-08","prism:volume":"111","prism:number":"B8","prism:startingPage":"B08308"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2005JB004016"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2005JB004016"}],"createdAt":"2006-08-23","modifiedAt":"2023-10-13","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050566774865076224","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Stable Forearc Stressed by a Weak Megathrust: Mechanical and Geodynamic Implications of Stress Changes Caused by the M = 9 Tohoku‐Oki Earthquake"}]},{"@id":"https://cir.nii.ac.jp/crid/1050587981430851712","@type":"Article","resourceType":"学術雑誌論文(journal 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From Immediate Aftershocks Following the 2023 <i>M</i><sub><i>j</i></sub>6.5 Earthquake Beneath the Noto Peninsula, Central Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360285707500072704","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Three-dimensional resistivity modelling of a seismogenic area in an oblique subduction zone in the western Kurile arc: Constraints from anomalous magnetotelluric phases"}]},{"@id":"https://cir.nii.ac.jp/crid/1360290617572632448","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Topographic Evolution Involving Co-Seismic Landslide, Deformation, Long-Term Folding and Isostatic Rebound: A Case Study on the 2004 Chuetsu Earthquake"}]},{"@id":"https://cir.nii.ac.jp/crid/1360846641638336896","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Non‐volcanic seismic swarms triggered by circulating fluids and pressure fluctuations above a solidified diorite intrusion"}]},{"@id":"https://cir.nii.ac.jp/crid/1360848658222202752","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Crustal Deformation Process in the Mid‐Niigata Region of the Niigata‐Kobe Tectonic Zone as Observed by Dense GPS Network Before, During, and After the Tohoku‐Oki Earthquake"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206238345344","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Crustal structure and earthquake source faults on the backarc side of northern Honshu, Japan"},{"@language":"ja","@value":"北部本州背弧域の地殻構造と震源断層"},{"@language":"ja-Kana","@value":"ホクブホンシュウ ハイ コイキ ノ チカク コウゾウ ト シンゲン ダンソウ"},{"@value":"Crustal structure and earthquake source faults on the backarc side of northern Honshu, Japan (in Japanese with English abstract)"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206238346752","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Relationships between geological structure and earthquake source faults along the eastern margin of the Japan Sea"},{"@language":"ja","@value":"日本海東縁の地質構造と震源断層との関係"},{"@language":"ja-Kana","@value":"ニホンカイ トウエン ノ チシツ コウゾウ ト シンゲン ダンソウ ト ノ カンケイ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206496172928","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"微小地震スペクトルを用いたQトモグラフィ<br/>—震源パラメターとQ値の同時推定法の中越地震震源域への適用例—"},{"@language":"en","@value":"<i>Q</i> Tomography using small earthquake spectra<br/>—Application of combined inversion of source parameters and <i>Q</i> values to the data derived in the 2004 Mid-Niigata earthquake source region—"},{"@value":"微小地震スペクトルを用いたQトモグラフィ--震源パラメターとQ値の同時推定法の中越地震震源域への適用例"},{"@language":"ja-Kana","@value":"ビショウ ジシン スペクトル オ モチイタ Qトモグラフィ シンゲン パラメター ト Qチ ノ ドウジ スイテイホウ ノ チュウエツ ジシン シンゲンイキ エ ノ テキヨウ レイ"},{"@value":"<i>Q</i> Tomography using small earthquake spectra<br/>&mdash;Application of combined inversion of source parameters and <i>Q</i> values to the data derived in the 2004 Mid-Niigata earthquake source region&mdash;"}]},{"@id":"https://cir.nii.ac.jp/crid/1390004222631011072","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Hyper Dense Seismic Observation for Investigation on Fault Zone Development: Application to Hypocentral Area of 2000 Western Tottori Earthquake"},{"@language":"ja","@value":"超多点稠密地震観測による断層帯発達過程の解明に向けて"},{"@value":"超多点稠密地震観測による断層帯発達過程の解明に向けて : 2000年鳥取県西部地震域への適用"},{"@language":"ja-Kana","@value":"チョウタテンチュウミツジシン カンソク ニ ヨル ダンソウタイ ハッタツ カテイ ノ カイメイ ニ ムケテ : 2000ネン トットリケン セイブ ジシンイキ エ ノ テキヨウ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282679122034944","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"The 2016 Kumamoto earthquake sequence"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282679279743488","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Japanese National Research Program for Earthquake Prediction"},{"@language":"ja","@value":"日本の地震予知研究 —地震予知のための観測研究計画—"},{"@value":"日本の地震予知研究--地震予知のための観測研究計画"},{"@language":"ja-Kana","@value":"ニホン ノ ジシン ヨチ ケンキュウ ジシン ヨチ ノ タメ ノ カンソク ケンキュウ ケイカク"}]},{"@id":"https://cir.nii.ac.jp/crid/2051433317021984640","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Gravity gradient tensor analysis to an active fault : a case study at the Togi-gawa Nangan fault, Noto Peninsula, central 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