{"@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/1363388844976863360.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1029/2012gc004391"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2012GC004391"}},{"identifier":{"@type":"URI","@value":"https://onlinelibrary.wiley.com/doi/pdf/10.1029/2012GC004391"}},{"identifier":{"@type":"URI","@value":"https://onlinelibrary.wiley.com/doi/full-xml/10.1029/2012GC004391"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2012GC004391"}}],"dc:title":[{"@value":"Low frequency earthquakes below southern Vancouver Island"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>The nature and distribution of low frequency earthquakes (LFEs) in subduction zones provide insight into plate boundary deformation downdip of the locked seismogenic zone. We employ network autocorrelation detection to identify LFE families beneath southern Vancouver Island and environs. An initial suite of 5775 LFEs detected in 2004 and 2005 at a select set of 7 stations is grouped into 140 families using waveform cluster analysis. These families are used as templates within an iterative network cross correlation scheme to detect LFEs across different tremor episodes, incorporate new stations, and improve LFE template signal‐to‐noise ratio. As in southwest Japan, representative LFE locations define a relatively tight, dipping surface several km above the locus of intraslab seismicity, within a prominent, dipping low‐velocity zone (LVZ). LFE polarizations for near‐vertical source‐receiver geometries possess a remarkably uniform dipolar signature indicative of point‐source, double‐couple excitation. Focal mechanisms determined from<jats:italic>P</jats:italic>‐wave first motions are characterized by a combination of strike‐slip and thrust faulting. We suggest that LFEs and regular intraslab seismicity occur in distinct structural and stress regimes. The LVZ, inferred to represent weak, overpressured, porous and mylonitized metabasalts of oceanic crustal Layer 2, separates LFEs manifesting deformation within a plate boundary shear zone from intraslab earthquakes generated by tensional stresses and dehydration embrittlement within a more competent lower oceanic crustal Layer 3 and underlying mantle.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380013168718641039","@type":"Researcher","foaf:name":[{"@value":"M. G. Bostock"}]},{"@id":"https://cir.nii.ac.jp/crid/1383388844976863360","@type":"Researcher","foaf:name":[{"@value":"A. A. Royer"}]},{"@id":"https://cir.nii.ac.jp/crid/1383388844976863362","@type":"Researcher","foaf:name":[{"@value":"E. H. Hearn"}]},{"@id":"https://cir.nii.ac.jp/crid/1383388844976863361","@type":"Researcher","foaf:name":[{"@value":"S. M. Peacock"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"15252027"},{"@type":"EISSN","@value":"15252027"}],"prism:publicationName":[{"@value":"Geochemistry, Geophysics, Geosystems"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2012-11","prism:volume":"13","prism:number":"11","prism:startingPage":"Q11007"},"reviewed":"false","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2012GC004391"},{"@id":"https://onlinelibrary.wiley.com/doi/pdf/10.1029/2012GC004391"},{"@id":"https://onlinelibrary.wiley.com/doi/full-xml/10.1029/2012GC004391"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2012GC004391"}],"createdAt":"2012-10-15","modifiedAt":"2023-09-11","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360004229808521216","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Resolving the Detailed Spatiotemporal Slip Evolution of Deep Tremor in Western Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567182379064192","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Relationships among temperature, dehydration of the subducting Philippine Sea plate, and the occurrence of a megathrust earthquake, low-frequency earthquakes, and a slow slip event in the Tokai district, central Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360572092855804032","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Imaging different components of a tectonic tremor sequence in southwestern Japan using an automatic statistical detection and location method"}]},{"@id":"https://cir.nii.ac.jp/crid/1360576118671918848","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Empirical Low‐Frequency Earthquakes Synthesized From Tectonic Tremor Records"}]},{"@id":"https://cir.nii.ac.jp/crid/1361137044355533824","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Self-similarity of low-frequency earthquakes"}]},{"@id":"https://cir.nii.ac.jp/crid/1361975843010344832","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Detection of Low‐Frequency Earthquakes in Broadband Random Time Sequences: Are They Independent Events?"}]},{"@id":"https://cir.nii.ac.jp/crid/1390855190129327616","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Spatial changes in inclusion band spacing as an indicator of temporal changes in slow slip and tremor recurrence intervals"},{"@language":"ja","@value":"Spatial changes in inclusion band spacing as an indicator of temporal changes in slow slip and tremor recurrence intervals"}]},{"@id":"https://cir.nii.ac.jp/crid/2050025942143152000","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Bridging the gap between low-frequency and very-low-frequency earthquakes"}]},{"@id":"https://cir.nii.ac.jp/crid/2051714791997604480","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Development of a modifed envelope correlation method based on maximum-likelihood method and application to detecting and locating deep tectonic tremors in western Japan"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1029/2012gc004391"},{"@type":"CROSSREF","@value":"10.1002/2017jb014494_references_DOI_Jk77j7tKuidG9LAauHOQZk193KL"},{"@type":"CROSSREF","@value":"10.1016/j.pepi.2016.09.004_references_DOI_Jk77j7tKuidG9LAauHOQZk193KL"},{"@type":"CROSSREF","@value":"10.1038/s41598-020-63584-6_references_DOI_Jk77j7tKuidG9LAauHOQZk193KL"},{"@type":"CROSSREF","@value":"10.1186/s40623-021-01448-7_references_DOI_Jk77j7tKuidG9LAauHOQZk193KL"},{"@type":"CROSSREF","@value":"10.1186/s40623-020-01172-8_references_DOI_Jk77j7tKuidG9LAauHOQZk193KL"},{"@type":"CROSSREF","@value":"10.1186/s40623-019-1022-x_references_DOI_6tLD9zbjjktzRXPrMEFrzG5FdgP"},{"@type":"CROSSREF","@value":"10.1093/gji/ggy070_references_DOI_Jk77j7tKuidG9LAauHOQZk193KL"},{"@type":"CROSSREF","@value":"10.1029/2021jb022498_references_DOI_Jk77j7tKuidG9LAauHOQZk193KL"},{"@type":"CROSSREF","@value":"10.1029/2019jb017643_references_DOI_Jk77j7tKuidG9LAauHOQZk193KL"}]}