{"@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/1360004230122177408.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1002/grl.50223"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fgrl.50223"}},{"identifier":{"@type":"URI","@value":"https://onlinelibrary.wiley.com/doi/pdf/10.1002/grl.50223"}},{"identifier":{"@type":"URI","@value":"https://onlinelibrary.wiley.com/doi/full-xml/10.1002/grl.50223"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/grl.50223"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"Segmentation of the Vp/Vs ratio and low‐frequency earthquake distribution around the fault boundary of the Tonankai and Nankai earthquakes"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Abstract</jats:title><jats:p>Beneath the Kii Peninsula, the distribution of low‐frequency earthquakes (LFEs) forms three clusters. A previous study shows that one of the clusters has anomalously less amount of cumulative slip than the others. To understand the cause of this variation, we applied a tomographic analysis using arrival times of earthquakes recorded by both ocean bottom seismometers and onshore stations. As a result, we identified segmentation about the Vp/Vs ratio around the subducting plate interface corresponding to the distribution of LFEs. One of the segments has low a Vp/Vs ratio that coincides with the small‐slip LFE cluster. Another segment has a high Vp/Vs ratio in which almost no LFEs occur. We conclude that the relatively low pore fluid pressure within the low Vp/Vs segment contributes to the small‐slip LFE cluster and that the gap of LFEs within the high Vp/Vs segment corresponds to stable slip area due to high pore fluid pressure.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380004230122177281","@type":"Researcher","foaf:name":[{"@value":"Takeshi Akuhara"}],"jpcoar:affiliationName":[{"@value":"Earthquake Research Institute University of Tokyo  Tokyo Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1420282801212570752","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"80292861"},{"@type":"NRID","@value":"1000080292861"},{"@type":"NRID","@value":"9000001755202"},{"@type":"NRID","@value":"9000024177914"},{"@type":"NRID","@value":"9000264263201"},{"@type":"NRID","@value":"9000000236437"},{"@type":"NRID","@value":"9000237782980"},{"@type":"NRID","@value":"9000014139694"},{"@type":"NRID","@value":"9000256898269"},{"@type":"NRID","@value":"9000256898282"},{"@type":"NRID","@value":"9000020071144"},{"@type":"NRID","@value":"9000405704131"},{"@type":"NRID","@value":"9000347166248"},{"@type":"NRID","@value":"9000237783564"},{"@type":"NRID","@value":"9000254741850"},{"@type":"NRID","@value":"9000258737404"},{"@type":"NRID","@value":"9000382634130"},{"@type":"NRID","@value":"9000254741043"},{"@type":"NRID","@value":"9000375915029"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/read0196034"}],"foaf:name":[{"@value":"Kimihiro Mochizuki"}],"jpcoar:affiliationName":[{"@value":"Earthquake Research Institute University of Tokyo  Tokyo 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Nakahigashi"}],"jpcoar:affiliationName":[{"@value":"Earthquake Research Institute University of Tokyo  Tokyo Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004230122177280","@type":"Researcher","foaf:name":[{"@value":"Tomoaki Yamada"}],"jpcoar:affiliationName":[{"@value":"Earthquake Research Institute University of Tokyo  Tokyo Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004230122177411","@type":"Researcher","foaf:name":[{"@value":"Masanao Shinohara"}],"jpcoar:affiliationName":[{"@value":"Earthquake Research Institute University of Tokyo  Tokyo Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004230122177536","@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/1380004230122177409","@type":"Researcher","foaf:name":[{"@value":"Toshihiko Kanazawa"}],"jpcoar:affiliationName":[{"@value":"National Research Institute for Earth Science and Disaster Prevention  Tsukuba Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004230122177408","@type":"Researcher","foaf:name":[{"@value":"Kenji Uehira"}],"jpcoar:affiliationName":[{"@value":"National Research Institute for Earth Science and Disaster Prevention  Tsukuba Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004230122177410","@type":"Researcher","foaf:name":[{"@value":"Hiroshi Shimizu"}],"jpcoar:affiliationName":[{"@value":"Institute of Seismology and Volcanology, Faculty of Sciences Kyushu University  Shimabara Japan"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00948276"},{"@type":"EISSN","@value":"19448007"}],"prism:publicationName":[{"@value":"Geophysical Research Letters"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2013-04-15","prism:volume":"40","prism:number":"7","prism:startingPage":"1306","prism:endingPage":"1310"},"reviewed":"false","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fgrl.50223"},{"@id":"https://onlinelibrary.wiley.com/doi/pdf/10.1002/grl.50223"},{"@id":"https://onlinelibrary.wiley.com/doi/full-xml/10.1002/grl.50223"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/grl.50223"}],"createdAt":"2013-02-12","modifiedAt":"2023-10-09","project":[{"@id":"https://cir.nii.ac.jp/crid/1040000782044214912","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"20540408"},{"@type":"JGN","@value":"JP20540408"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20540408/"}],"notation":[{"@language":"ja","@value":"巨大地震アスペリティの実体解明のための海域構造調査および解析手法の開発"},{"@language":"en","@value":"Development of an analysis and observation method of active seismic surveys for understanding entities of large-earthquake asperities"}]},{"@id":"https://cir.nii.ac.jp/crid/1040000782062678912","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"21107007"},{"@type":"JGN","@value":"JP21107007"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PLANNED-21107007/"}],"notation":[{"@language":"ja","@value":"海溝型巨大地震の準備・発生過程のモデル構築"},{"@language":"en","@value":"Comprehensive modeling of pre- and co-seismic processes"}]}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360011142931982336","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"A cause of rupture segmentation and synchronization in the Nankai trough revealed by seismic imaging and numerical simulation"}]},{"@id":"https://cir.nii.ac.jp/crid/1360011142939463424","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Detailed structural image around splay‐fault branching in the 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