{"@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/1390282679282533248.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.4294/zisin.2017-4"}},{"identifier":{"@type":"URI","@value":"https://www.jstage.jst.go.jp/article/zisin/70/0/70_183/_pdf"}},{"identifier":{"@type":"NAID","@value":"130006251716"}}],"dc:title":[{"@language":"ja","@value":"日本列島周辺の地震クラスター"},{"@language":"en","@value":"Earthquake Clusters in the Japanese Islands"}],"dcterms:alternative":[{"@language":"ja","@value":"——検出および時間·空間的特徴——"},{"@language":"en","@value":"——Detection and Spatial-Temporal Characteristics——"}],"dc:language":"ja","description":[{"type":"abstract","notation":[{"@language":"en","@value":"<p>Seismic activity is spatially concentrated, defining earthquake clusters, and varies temporally with the occurrence of large earthquakes and earthquake swarms. However, earthquake clusters that occur in isolation from surrounding earthquakes are rarely observed. To investigate the seismic activity in a given area, it is preferable that an earthquake cluster is objectively extracted. In this study, we extracted earthquake clusters in and around the Japanese islands based on hypocenter information listed in the unified catalog of the Japan Meteorological Agency. As a result, we identified that earthquake clusters were efficiently extracted in nearly all areas in which hypocenters are well determined. The seismic characteristics of the earthquake clusters clarify the spatial-temporal heterogeneity of earthquake occurrence and illustrate the temporal changes in seismic activity in each area. Many repeating earthquakes are located in the Pacific Plate subducting from the Kuril-Japan Trench and Philippine Sea plate subducting from the Ryukyu Trench. Earthquake clusters with a high incidence of repeating earthquakes are concentrated near the deepest limit of the inter-plate coupling areas at the Pacific plate. In contrast, most earthquake clusters in regions of subduction-related inter-plate earthquakes are characterized as sequences of mainshock - aftershock type, owing to the occurrence of aftershocks following large earthquakes. Using this method of focusing on earthquake cluster, additional earthquake data are easily analyzed. Moreover, this approach is useful in investigating temporal changes in seismic activity and detecting previously unknown earthquake clusters. The intensive monitoring of earthquake clusters will provide a better understanding of the spatial-temporal changes in seismic activity throughout the Japanese islands.</p>"}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1420564276170486656","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"10334286"},{"@type":"NRID","@value":"1000010334286"},{"@type":"NRID","@value":"9000006569853"},{"@type":"NRID","@value":"9000375917487"},{"@type":"NRID","@value":"9000023619582"},{"@type":"NRID","@value":"9000391404809"},{"@type":"NRID","@value":"9000279888024"},{"@type":"NRID","@value":"9000001755572"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/read0076919"}],"foaf:name":[{"@language":"ja","@value":"五十嵐 俊博"},{"@language":"en","@value":"IGARASHI Toshihiro"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Earthquake Research Institute, The University of Tokyo"},{"@language":"ja","@value":"東京大学地震研究所"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00371114"},{"@type":"LISSN","@value":"00371114"},{"@type":"EISSN","@value":"18839029"},{"@type":"EISSN","@value":"2186599X"}],"prism:publicationName":[{"@language":"en","@value":"Zisin (Journal of the Seismological Society of Japan. 2nd ser.)"},{"@language":"ja","@value":"地震　第２輯"},{"@value":"地震　第2輯"},{"@language":"ja","@value":"地震"},{"@language":"ja","@value":"地震　第２輯"},{"@language":"en","@value":"JSSJ"},{"@language":"en","@value":"Zisin"},{"@language":"en","@value":"BSSJ"},{"@language":"en","@value":"Zisin (Journal of the Seismological Society of Japan. 2nd ser.)"},{"@language":"en","@value":"Zisin1"},{"@language":"ja","@value":"地震１"},{"@language":"ja","@value":"地震　第１輯"}],"dc:publisher":[{"@language":"en","@value":"SEISMOLOGICAL SOCIETY OF JAPAN"},{"@language":"ja","@value":"公益社団法人 日本地震学会"}],"prism:publicationDate":"2017-11-10","prism:volume":"70","prism:number":"0","prism:startingPage":"183","prism:endingPage":"194"},"reviewed":"false","url":[{"@id":"https://www.jstage.jst.go.jp/article/zisin/70/0/70_183/_pdf"}],"availableAt":"2017-11-10","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=Earthquake%20cluster","dc:title":"Earthquake cluster"},{"@id":"https://cir.nii.ac.jp/all?q=Seismicity","dc:title":"Seismicity"},{"@id":"https://cir.nii.ac.jp/all?q=Repeating%20earthquake","dc:title":"Repeating earthquake"},{"@id":"https://cir.nii.ac.jp/all?q=Japan","dc:title":"Japan"}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360004233288139392","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Widespread seismicity excitation throughout central Japan following the 2011 M=9.0 Tohoku earthquake and its interpretation by Coulomb stress transfer"}]},{"@id":"https://cir.nii.ac.jp/crid/1360285710495314176","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Hypocenter migration and crustal seismic velocity distribution observed for the inland earthquake swarms induced by the 2011 Tohoku‐Oki earthquake in NE Japan: implications for crustal fluid distribution and crustal permeability"}]},{"@id":"https://cir.nii.ac.jp/crid/1360292617909532032","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"New, improved version of generic mapping tools released"}]},{"@id":"https://cir.nii.ac.jp/crid/1360292617913680896","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"An updated digital model of plate boundaries"}]},{"@id":"https://cir.nii.ac.jp/crid/1360292617916961792","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"On the biannually repeating slow‐slip events at the 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space-time occurrences of earthquakes and its residual analysis"}]},{"@id":"https://cir.nii.ac.jp/crid/2050025942182797056","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Short-term slow slip events along the Ryukyu Trench, southwestern Japan, observed by continuous GNSS"}]},{"@id":"https://cir.nii.ac.jp/crid/2051151842091746048","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Aftershock observation of the 2011 off the Pacific coast of Tohoku Earthquake by using ocean bottom seismometer network"}]}],"dataSourceIdentifier":[{"@type":"JALC","@value":"oai:japanlinkcenter.org:2003491180"},{"@type":"CROSSREF","@value":"10.4294/zisin.2017-4"},{"@type":"CIA","@value":"130006251716"},{"@type":"OPENAIRE","@value":"doi_dedup___::d510bd27708477612cbdde44f1fb0765"}]}