{"@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/1362544420684797184.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1029/2005jb004081"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2005JB004081"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2005JB004081"}}],"dc:title":[{"@value":"High‐resolution subduction zone seismicity and velocity structure beneath Ibaraki Prefecture, Japan"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>We use double‐difference tomography and waveform‐derived cross‐correlation differential times to estimate earthquake locations and <jats:italic>P</jats:italic> and <jats:italic>S</jats:italic> wave velocity structure in the subduction zone under Ibaraki and neighboring prefectures of north central Honshu. We find evidence in both earthquake hypocenters and the velocity structure that the Philippine Sea plate, or perhaps a microplate fragment, may be caught between the subducting Pacific plate and overriding Okhotsk plate in this region. In the southern part of the study area, we find a zone of interplate events extending as deep as 60 km, forming a distinct lineation in cross section. Focal mechanisms support the interpretation that these are low‐angle, subduction interface events. We infer that these events probably occur on the interface between the Pacific and Philippine Sea plates rather than between the Pacific and Okhotsk plates. In the upper part of the downgoing Pacific plate, we find a zone of high <jats:italic>Vp</jats:italic>/<jats:italic>Vs</jats:italic> ratio (∼1.95), which may be explained by high pore fluid pressures within the subducting crust. At a depth of 60–80 km, this region of high <jats:italic>Vp</jats:italic>/<jats:italic>Vs</jats:italic> appears to diffuse into the overlying mantle wedge, possibly indicating the upward release of fluids from the slab.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1382544420684797188","@type":"Researcher","foaf:name":[{"@value":"David R. Shelly"}],"jpcoar:affiliationName":[{"@value":"Department of Geophysics Stanford University  Stanford California USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1382544420684797187","@type":"Researcher","foaf:name":[{"@value":"Gregory C. Beroza"}],"jpcoar:affiliationName":[{"@value":"Department of Geophysics Stanford University  Stanford California USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1382544420684797184","@type":"Researcher","foaf:name":[{"@value":"Haijiang Zhang"}],"jpcoar:affiliationName":[{"@value":"Department of Geology and Geophysics University of Wisconsin–Madison  Madison Wisconsin USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1382544420684797186","@type":"Researcher","foaf:name":[{"@value":"Clifford H. Thurber"}],"jpcoar:affiliationName":[{"@value":"Department of Geology and Geophysics University of Wisconsin–Madison  Madison Wisconsin USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1382544420684797185","@type":"Researcher","foaf:name":[{"@value":"Satoshi Ide"}],"jpcoar:affiliationName":[{"@value":"Department of Earth and Planetary Science University of Tokyo  Tokyo Japan"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"01480227"}],"prism:publicationName":[{"@value":"Journal of Geophysical Research: Solid Earth"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2006-06","prism:volume":"111","prism:number":"B6","prism:startingPage":"B06311"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2005JB004081"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2005JB004081"}],"createdAt":"2006-06-19","modifiedAt":"2023-10-13","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360004232173783296","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Tomographic imaging of hydrated crust and mantle in the subducting Pacific slab beneath Hokkaido, Japan: Evidence for dehydration embrittlement as a cause of intraslab earthquakes"}]},{"@id":"https://cir.nii.ac.jp/crid/1360857593651126016","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Seismicity and velocity structure in the vicinity of repeating slow slip earthquakes, northern Hikurangi subduction zone, New Zealand"}]},{"@id":"https://cir.nii.ac.jp/crid/1360869855136930304","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"The Elusive Role of Aseismic Slip Along a Seaward Dipping Normal Fault in the Indirect Triggering of a Normal Faulting Earthquake Sequence in Northeast Japan Following the 2011 Tohoku‐Oki Megathrust"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001204302989184","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Tomographic Evidence of Slab Subduction and Arc Magmatism in the Japan Subduction Zone"},{"@language":"ja","@value":"地震波トモグラフィでみたスラブの沈み込みと島弧マグマ活動"},{"@language":"ja-Kana","@value":"ジシンハ トモグラフィ デ ミタ スラブ ノ シズミ コミ ト トウコ マグマ カツドウ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390012711622887808","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Imaging of S Wave Reflection Boundaries in the Crust Obtained from a Dense Seismic Array at the Northern Part of Ibaraki and Iwaki Area"},{"@language":"ja","@value":"北茨城-いわき地域における稠密アレイで記録された地殻内S波反射波イメージング"}]},{"@id":"https://cir.nii.ac.jp/crid/2051714791869811968","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Seismic imaging of slab metamorphism and genesis of intermediate-depth intraslab earthquakes"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1029/2005jb004081"},{"@type":"OPENAIRE","@value":"doi_dedup___::9e3af5cd169722136fa8be501f067481"},{"@type":"CROSSREF","@value":"10.1016/j.gr.2008.12.010_references_DOI_7HT45bMBDxqSdP9ZyZ63JAAMyik"},{"@type":"CROSSREF","@value":"10.1186/s40645-017-0126-9_references_DOI_7HT45bMBDxqSdP9ZyZ63JAAMyik"},{"@type":"CROSSREF","@value":"10.4294/zisin.61.177_references_DOI_7HT45bMBDxqSdP9ZyZ63JAAMyik"},{"@type":"CROSSREF","@value":"10.1016/j.epsl.2021.116887_references_DOI_7HT45bMBDxqSdP9ZyZ63JAAMyik"},{"@type":"CROSSREF","@value":"10.4294/zisin.2021-13_references_DOI_7HT45bMBDxqSdP9ZyZ63JAAMyik"},{"@type":"CROSSREF","@value":"10.1029/2024jb028903_references_DOI_7HT45bMBDxqSdP9ZyZ63JAAMyik"}]}