{"@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/1360002219010914560.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1186/s40562-017-0077-4"}},{"identifier":{"@type":"URI","@value":"http://link.springer.com/content/pdf/10.1186/s40562-017-0077-4.pdf"}},{"identifier":{"@type":"URI","@value":"http://link.springer.com/article/10.1186/s40562-017-0077-4/fulltext.html"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"Re-examination of the age of historical and paleo-tsunami deposits at Koyadori on the Sanriku Coast, Northeast Japan"}],"description":[{"notation":[{"@value":"Abstract High-accuracy age estimations of tsunami deposits are very important for tsunami deposit research because the recurrence interval and frequency of tsunami deposits allow us to assess the devastating impacts of tsunamis in a populated country such as Japan. The correlation of tsunami events between remote coastal areas further enables us to constrain tsunami scenarios and fault segmentation along a trench. Before the 2011 Tohoku-oki earthquake, the long-term tsunami history along the Sanriku Coast was not well known. Age data of the long-term tsunami history are essential to understand the mechanisms of tsunami generation and earthquakes and to assess the risks posed by them. This study re-examined the age of historical and paleo-tsunami deposits (E1 to E11 deposits) at Koyadori in the middle of the Sanriku Coast and estimated their ages with high accuracy by using continuous sediments since approximately 4 ka. Radiocarbon dating was conducted in combination with other radiometric dating methods (137Cs and excess 210Pb) to estimate the ages of the sediments. The resulting ages revealed the reliable ages of ten historical and paleo-tsunami deposits. The average recurrence interval of historical and paleo-tsunamis in the last 4 ka is 350–390 years, and each recurrence interval between the E4 and E11 deposits is similar despite the tsunami deposits having different characteristics. Moreover, far-field tsunamis do not seem to inundate this site based on the observed and documented records. The continuous and long-term data of tsunami deposits at Koyadori offer important constraints on the timing and frequency of near-field earthquakes (e.g., megathrust, outer-rise, and tsunami earthquakes) around the Japan Trench."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1420282801182155904","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"00736225"},{"@type":"NRID","@value":"1000000736225"},{"@type":"ORCID","@value":"0000-0002-4798-3425"},{"@type":"NRID","@value":"9000248240045"},{"@type":"NRID","@value":"9000014159281"},{"@type":"NRID","@value":"9000413729806"},{"@type":"NRID","@value":"9000020962943"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/ishimura.daisuke"}],"foaf:name":[{"@value":"Daisuke Ishimura"}]}],"publication":{"publicationIdentifier":[{"@type":"EISSN","@value":"21964092"}],"prism:publicationName":[{"@value":"Geoscience Letters"}],"dc:publisher":[{"@value":"Springer Science and Business Media LLC"}],"prism:publicationDate":"2017-05-05","prism:volume":"4","prism:number":"1","prism:startingPage":"11"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","dc:rights":["https://creativecommons.org/licenses/by/4.0","https://creativecommons.org/licenses/by/4.0"],"url":[{"@id":"http://link.springer.com/content/pdf/10.1186/s40562-017-0077-4.pdf"},{"@id":"http://link.springer.com/article/10.1186/s40562-017-0077-4/fulltext.html"}],"createdAt":"2017-05-05","modifiedAt":"2020-05-16","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=Radiocarbon%20dating","dc:title":"Radiocarbon dating"},{"@id":"https://cir.nii.ac.jp/all?q=The%202011%20Tohoku-oki%20earthquake","dc:title":"The 2011 Tohoku-oki earthquake"},{"@id":"https://cir.nii.ac.jp/all?q=QE1-996.5","dc:title":"QE1-996.5"},{"@id":"https://cir.nii.ac.jp/all?q=137Cs","dc:title":"137Cs"},{"@id":"https://cir.nii.ac.jp/all?q=Science","dc:title":"Science"},{"@id":"https://cir.nii.ac.jp/all?q=Q","dc:title":"Q"},{"@id":"https://cir.nii.ac.jp/all?q=Sanriku%20Coast","dc:title":"Sanriku Coast"},{"@id":"https://cir.nii.ac.jp/all?q=Geology","dc:title":"Geology"},{"@id":"https://cir.nii.ac.jp/all?q=Paleo-tsunami%20deposits","dc:title":"Paleo-tsunami deposits"},{"@id":"https://cir.nii.ac.jp/all?q=210Pb","dc:title":"210Pb"}],"project":[{"@id":"https://cir.nii.ac.jp/crid/1040000781974537600","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"17K18532"},{"@type":"JGN","@value":"JP17K18532"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17K18532/"}],"notation":[{"@language":"ja","@value":"高密度掘削試料の総合的解析による津波堆積物の地層対比手法の確立"},{"@language":"en","@value":"Establishment for accurate correlation of tsunami deposit layer, based on dense core sample and comprehensive analysis"}]}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050585658871539712","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Numerical estimation of a tsunami source at the flexural area of Kuril and Japan Trenches in the fifteenth to seventeenth century based on paleotsunami deposit distributions in northern Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360002216709607680","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Challenges of anticipating the 2011 Tohoku earthquake and tsunami using coastal geology"}]},{"@id":"https://cir.nii.ac.jp/crid/1360005516799846528","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Dating tsunami deposits: Present knowledge and 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records"}]},{"@id":"https://cir.nii.ac.jp/crid/1363388846043136128","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Fault slip and seismic moment of the 1700 Cascadia earthquake inferred from Japanese tsunami descriptions"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001204238127744","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Characteristics of Tephras Interbedded with the Holocene Sediments on the Sanriku Coast, Northeast Japan"},{"@language":"ja","@value":"三陸海岸の完新統に挟在するテフラの特徴"},{"@language":"ja-Kana","@value":"サンリク カイガン ノ カンシントウ ニ キョウザイスル テフラ ノ トクチョウ"},{"@value":"Characteristics of tephras interbedded with the Holocene sediments in the Sanriku Coast, northeast Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001288143693568","@type":"Article","resourceType":"学術雑誌論文(journal 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試料と生物化石試料間に認められる放射性炭素年代値の系統的な差とその要因"},{"@language":"en","@value":"Systematic Age Gap of Radiocarbon Dates between Organic Bulk Sediment Samples and Fossil Samples of Animal and Plant in Holocene Core Sediments and Their Causes"},{"@language":"ja-Kana","@value":"カンシントウコア チュウ ノ ユウキシツ タイセキブツ(バルク)シリョウ ト セイブツ カセキ シリョウ カン ニ ミトメラレル ホウシャセイ タンソ ネンダイチ ノ ケイトウテキ ナ サ ト ソノ ヨウイン"}]},{"@id":"https://cir.nii.ac.jp/crid/1390570176043963520","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Progress in tsunami sedimentology"},{"@language":"ja","@value":"津波堆積学の進展"},{"@language":"ja-Kana","@value":"ツナミ タイセキガク ノ シンテン"}]},{"@id":"https://cir.nii.ac.jp/crid/2050870367089655296","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Washover deposits related to tsunami and storm surge along the north coast of the Shimokita Peninsula in northern 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