{"@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/1360004229806477824.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1002/2016jb013417"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F2016JB013417"}},{"identifier":{"@type":"URI","@value":"https://onlinelibrary.wiley.com/doi/pdf/10.1002/2016JB013417"}},{"identifier":{"@type":"URI","@value":"https://onlinelibrary.wiley.com/doi/full-xml/10.1002/2016JB013417"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2016JB013417"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"Near‐field observations of an offshore <i>M<sub>w</sub></i> 6.0 earthquake from an integrated seafloor and subseafloor monitoring network at the Nankai Trough, southwest Japan"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Abstract</jats:title><jats:p>An <jats:italic>M<jats:sub>w</jats:sub></jats:italic> 6.0 earthquake struck ~50 km offshore the Kii Peninsula of southwest Honshu, Japan on 1 April 2016. This earthquake occurred directly beneath a cabled offshore monitoring network at the Nankai Trough subduction zone and within 25–35 km of two borehole observatories installed as part of the International Ocean Discovery Program's NanTroSEIZE project. The earthquake's location close to the seafloor and subseafloor network offers a unique opportunity to evaluate dense seafloor geodetic and seismological data in the near field of a moderate‐sized offshore earthquake. We use the offshore seismic network to locate the main shock and aftershocks, seafloor pressure sensors, and borehole observatory data to determine the detailed distribution of seafloor and subseafloor deformation, and seafloor pressure observations to model the resulting tsunami. Contractional strain estimated from formation pore pressure records in the borehole observatories (equivalent to 0.37 to 0.15 μstrain) provides a key to narrowing the possible range of fault plane solutions. Together, these data show that the rupture occurred on a landward dipping thrust fault at 9–10 km below the seafloor, most likely on the plate interface. Pore pressure changes recorded in one of the observatories also provide evidence for significant afterslip for at least a few days following the main shock. The earthquake and its aftershocks are located within the coseismic slip region of the 1944 Tonankai earthquake (<jats:italic>M<jats:sub>w</jats:sub></jats:italic> ~8.0), and immediately downdip of swarms of very low frequency earthquakes in this region, illustrating the complex distribution of megathrust slip behavior at a dominantly locked seismogenic zone.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380004229806477824","@type":"Researcher","foaf:name":[{"@value":"L. M. Wallace"}],"jpcoar:affiliationName":[{"@value":"Institute for Geophysics University of Texas at Austin  Austin Texas USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004229806477826","@type":"Researcher","foaf:name":[{"@value":"E. Araki"}],"jpcoar:affiliationName":[{"@value":"JAMSTEC  Yokohama Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004229806478081","@type":"Researcher","foaf:name":[{"@value":"D. Saffer"}],"jpcoar:affiliationName":[{"@value":"Department of Geology Pennsylvania State University  University Park Pennsylvania USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004229806478082","@type":"Researcher","foaf:name":[{"@value":"X. Wang"}],"jpcoar:affiliationName":[{"@value":"GNS Science  Lower Hutt New Zealand"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004229806477827","@type":"Researcher","foaf:name":[{"@value":"A. Roesner"}],"jpcoar:affiliationName":[{"@value":"MARUM University of Bremen  Bremen Germany"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004229806477954","@type":"Researcher","foaf:name":[{"@value":"A. Kopf"}],"jpcoar:affiliationName":[{"@value":"MARUM University of Bremen  Bremen Germany"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004229806477956","@type":"Researcher","foaf:name":[{"@value":"A. Nakanishi"}],"jpcoar:affiliationName":[{"@value":"JAMSTEC  Yokohama Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004229806477830","@type":"Researcher","foaf:name":[{"@value":"W. Power"}],"jpcoar:affiliationName":[{"@value":"GNS Science  Lower Hutt New Zealand"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004229806478080","@type":"Researcher","foaf:name":[{"@value":"R. Kobayashi"}],"jpcoar:affiliationName":[{"@value":"Graduate School of Science and Engineering Kagoshima University  Kagoshima Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004229806477952","@type":"Researcher","foaf:name":[{"@value":"C. Kinoshita"}],"jpcoar:affiliationName":[{"@value":"Disaster Prevention Research Institute Kyoto University  Kyoto Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004229806477825","@type":"Researcher","foaf:name":[{"@value":"S. Toczko"}],"jpcoar:affiliationName":[{"@value":"JAMSTEC  Yokohama Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004229806478208","@type":"Researcher","foaf:name":[{"@value":"T. Kimura"}],"jpcoar:affiliationName":[{"@value":"JAMSTEC  Yokohama Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004229806477953","@type":"Researcher","foaf:name":[{"@value":"Y. Machida"}],"jpcoar:affiliationName":[{"@value":"JAMSTEC  Yokohama Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004229806477829","@type":"Researcher","foaf:name":[{"@value":"S. Carr"}],"jpcoar:affiliationName":[{"@value":"Bigelow Laboratory for Ocean Sciences East Boothbay  Maine USA"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"21699313"},{"@type":"EISSN","@value":"21699356"}],"prism:publicationName":[{"@value":"Journal of Geophysical Research: Solid Earth"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2016-11","prism:volume":"121","prism:number":"11","prism:startingPage":"8338","prism:endingPage":"8351"},"reviewed":"false","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F2016JB013417"},{"@id":"https://onlinelibrary.wiley.com/doi/pdf/10.1002/2016JB013417"},{"@id":"https://onlinelibrary.wiley.com/doi/full-xml/10.1002/2016JB013417"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2016JB013417"}],"createdAt":"2016-10-19","modifiedAt":"2023-09-03","project":[{"@id":"https://cir.nii.ac.jp/crid/1040282257263162624","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"26287109"},{"@type":"JGN","@value":"JP26287109"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-26287109/"}],"notation":[{"@language":"ja","@value":"計算機上で実施する南海トラフ反射法構造探査観測～地震波干渉法の応用"},{"@language":"en","@value":"Seismic reflection survey on the computers using seismic interferometry"}]},{"@id":"https://cir.nii.ac.jp/crid/1040282257416516864","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"15H05717"},{"@type":"JGN","@value":"JP15H05717"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15H05717/"}],"notation":[{"@language":"ja","@value":"プレート境界断層超深度掘削・観測による南海トラフ巨大地震切迫度評価"},{"@language":"en","@value":"Urgency Evaluation of the Nankai Great Earthquake and Tsunami by Scientific Ocean Drilling"}]}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050282677718392832","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Very low frequency earthquakes within accretionary prisms are very low stress-drop earthquakes"}]},{"@id":"https://cir.nii.ac.jp/crid/1050282677821468672","@type":"Article","resourceType":"学術雑誌論文(journal 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GPS"}]},{"@id":"https://cir.nii.ac.jp/crid/1360576118797635968","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Precise Monitoring of Pore Pressure at Boreholes Around Nankai Trough Toward Early Detecting Crustal Deformation"}]},{"@id":"https://cir.nii.ac.jp/crid/1360580232387082496","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Direct constraints on <i>in situ</i> stress state from deep drilling into the Nankai subduction zone, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360584340507043712","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Frictional properties of the décollement in the shallow Nankai Trough: Constraints from friction experiments simulating in-situ conditions and implications for the seismogenic 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