{"@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/1363670318316813440.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1016/j.tecto.2006.02.015"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S004019510600271X?httpAccept=text/xml"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S004019510600271X?httpAccept=text/plain"}}],"dc:title":[{"@value":"High precision slip distribution of the 1944 Tonankai earthquake inferred from tsunami waveforms: Possible slip on a splay fault"}],"description":[{"notation":[{"@value":"Abstract   Inversion of tsunami waveforms is a well-established technique for estimating the slip distributions of subduction zone earthquakes, with some of the most detailed results having been obtained for earthquakes in the Nankai Trough, SW Japan. The present study, although it uses a method and tsunami waveform data set almost identical to previous study, aims to improve on previous work by using a more precise specification of initial conditions for the calculation of tsunami Green's functions. Specifically, we incorporated four improvements in the present study: (1) we used a realistic plate model based only on seismic survey results, and assumed it to be the fault plane of the 1944 Tonankai earthquake; (2) the smallest subfaults consistent with the long wavelength approximation were used in the tsunami inversion analysis; (3) we included the effect of horizontal displacement of the ocean bottom on tsunami generation; and (4) we performed a checkerboard resolution test. As obtained in previous studies, a zone of high slip (> 2.0 m) was resolved off the Shima Peninsula. However, the more precise calculation of tsunami Green's functions has revealed additional detail that was not evident in previous studies, which we demonstrate is resolvable and correlates with the position of known faults in the accretionary prism. While there was little or no slip near the trench axis in the eastern part of the rupture zone, there was up to 1.5 m of slip resolved within 30 km of the trough axis in the western part, along the coast of the Kii Peninsula. This troughward slip zone coincides with the position of a large splay fault mapped in multichannel reflection surveys. Furthermore, it is also clear that the upper edge of the Enshu fault off Shima and Atsumi peninsulas is consistent with the up-dip limit of slip in the eastern part of our model. We tested the possibility that slip occurred on the former splay fault instead of on the plate interface during the 1944 Tonankai earthquake, and find that slip on this splay fault is also consistent with the data, although we cannot distinguish whether slip was dominant on the splay fault or on the plate interface. We further suggest that the position of the Enshu fault may be determined by the subduction of topographic highs, and that such faults may have an important influence on the up-dip rupture limit of the 1944 Tonankai and, potentially, other subduction zone earthquakes."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1383670318316813313","@type":"Researcher","foaf:name":[{"@value":"Toshitaka Baba"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670318316813440","@type":"Researcher","foaf:name":[{"@value":"Phil R. Cummins"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670318316813312","@type":"Researcher","foaf:name":[{"@value":"Takane Hori"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670318316813314","@type":"Researcher","foaf:name":[{"@value":"Yoshiyuki Kaneda"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00401951"}],"prism:publicationName":[{"@value":"Tectonophysics"}],"dc:publisher":[{"@value":"Elsevier BV"}],"prism:publicationDate":"2006-10","prism:volume":"426","prism:number":"1-2","prism:startingPage":"119","prism:endingPage":"134"},"reviewed":"false","dc:rights":["https://www.elsevier.com/tdm/userlicense/1.0/"],"url":[{"@id":"https://api.elsevier.com/content/article/PII:S004019510600271X?httpAccept=text/xml"},{"@id":"https://api.elsevier.com/content/article/PII:S004019510600271X?httpAccept=text/plain"}],"createdAt":"2006-07-04","modifiedAt":"2021-07-29","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050289532527693952","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Geometrical dependence on the stress and slip tendency acting on the subduction megathrust of Nankai seismogenic zone off Kumano"},{"@value":"Geometrical dependence on the stress and slip tendency acting on the subduction megathrust of the Nankai seismogenic zone off Kumano"}]},{"@id":"https://cir.nii.ac.jp/crid/1050845760765733504","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Near-trench slip potential of megaquakes evaluated from fault properties and conditions."}]},{"@id":"https://cir.nii.ac.jp/crid/1050855765273939328","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Deformation Structures From Splay and Décollement Faults in the Nankai Accretionary Prism, SW Japan(IODP NanTroSEIZE Expedition 316): Evidence for Slow and Rapid Slip in Fault Rocks"}]},{"@id":"https://cir.nii.ac.jp/crid/1050856995322335104","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Slip Distributions of Short-Term Slow Slip Events in Shikoku, Southwest Japan, From 2001 to 2019 Based on Tilt Change Measurements"},{"@value":"Slip Distributions of Short‐Term Slow Slip Events in Shikoku, Southwest Japan, From 2001 to 2019 Based on Tilt Change Measurements"}]},{"@id":"https://cir.nii.ac.jp/crid/1360004229800450944","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Contrasts in physical properties between the hanging wall and footwall of an exhumed seismogenic megasplay fault in a subduction zone—An example from the Nobeoka Thrust Drilling Project"}]},{"@id":"https://cir.nii.ac.jp/crid/1360004230175252224","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"A synthesis of heat flow determinations and thermal modeling along the Nankai Trough, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360004232324926976","@type":"Article","resourceType":"学術雑誌論文(journal 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