{"@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/1363388844604200320.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1029/2008jb005724"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2008JB005724"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2008JB005724"}}],"dc:title":[{"@value":"Coseismic strengthening of the shallow portion of the subduction fault and its effects on wedge taper"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>According to the dynamic Coulomb wedge model, coseismic strengthening of the shallowest part of the subduction interface can cause permanent deformation of the overlying outer wedge, so that the cumulative effects of great interplate earthquakes control the geometry of the wedge. In this work, we use a numerical model, which is a hybrid of the frictional contact model and the classical crack model, to study how stress is coseismically transferred from the seismogenic zone to the strengthening updip zone to cause wedge deformation. In this static model, the “critical strengthening” required to prevent the rupture from breaking the trench depends on the force drop of the seismogenic zone, defined as the product of the average shear stress drop and the area of the seismogenic zone. In a simple model of uniform material properties with a few megapascals average stress drop over a seismogenic zone of 120 km downdip width, the critical strengthening for a 30 km wide updip zone is an increase in the effective friction coefficient by about 0.05. Using the Coulomb wedge theory, we demonstrate that this level of strengthening can readily push the overlying wedge into a critical state of failure. With much greater strengthening, the rupture is able to extend into the updip zone only slightly, causing localized wedge compression in the area of slip termination. We examined wedge geometry of 22 subduction zones in the light of the model results. We found that the surface slope of these wedges is generally too high to be explained using the classical wedge theory but can be explained using the dynamic Coulomb wedge model including coseismic strengthening of the shallow portion of the megathrust.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1383388844604200320","@type":"Researcher","foaf:name":[{"@value":"Yan Hu"}],"jpcoar:affiliationName":[{"@value":"School of Earth and Ocean Sciences University of Victoria  Victoria, British Columbia Canada"}]},{"@id":"https://cir.nii.ac.jp/crid/1383388844604200321","@type":"Researcher","foaf:name":[{"@value":"Kelin Wang"}],"jpcoar:affiliationName":[{"@value":"School of Earth and Ocean Sciences University of Victoria  Victoria, British Columbia Canada"},{"@value":"Pacific Geoscience Centre Geological Survey of Canada  Sidney, British Columbia Canada"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"01480227"}],"prism:publicationName":[{"@value":"Journal of Geophysical Research: Solid Earth"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2008-12","prism:volume":"113","prism:number":"B12","prism:startingPage":"B12411"},"reviewed":"false","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2008JB005724"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2008JB005724"}],"createdAt":"2008-12-22","modifiedAt":"2023-10-12","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050566774865076224","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Stable Forearc Stressed by a Weak Megathrust: Mechanical and Geodynamic Implications of Stress Changes Caused by the M = 9 Tohoku‐Oki Earthquake"}]},{"@id":"https://cir.nii.ac.jp/crid/1360017282189362304","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Crustal Structure of the Hikurangi Margin From SHIRE Seismic Data and the Relationship Between Forearc Structure and Shallow Megathrust Slip Behavior"}]},{"@id":"https://cir.nii.ac.jp/crid/1360283690892978048","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Interplate coupling model off the southwestern coast of Java, Indonesia, based on continuous GPS data in 2008–2010"}]},{"@id":"https://cir.nii.ac.jp/crid/1360285704781401856","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Sensing of upslope passages of frontal bores across the trench slope break of the Japan Trench"}]},{"@id":"https://cir.nii.ac.jp/crid/1360285710917655936","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Dangers of Being Thin and Weak"}]},{"@id":"https://cir.nii.ac.jp/crid/1360306906071692032","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Crustal Structure of the Hikurangi Subduction Zone Revealed by Four Decades of Onshore‐Offshore Seismic Data: Implications for the Dimensions and Slip Behavior of the Seismogenic Zone"}]},{"@id":"https://cir.nii.ac.jp/crid/1360846640846352384","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Episodic deformation and inferred slow slip at the Nankai subduction zone during the first decade of CORK borehole pressure and VLFE monitoring"}]},{"@id":"https://cir.nii.ac.jp/crid/2051433317043076096","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"A new mechanical perspective on a shallow megathrust near-trench slip from the high-resolution fault model of the 2011 Tohoku-Oki earthquake"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1029/2008jb005724"},{"@type":"CROSSREF","@value":"10.1029/2021gl096960_references_DOI_RMWjygQ4py9v5cbonjCDwDyuNLw"},{"@type":"CROSSREF","@value":"10.1002/2015jc011432_references_DOI_EKKcIlNAFf3HqN0yxtOTiTS8DUr"},{"@type":"CROSSREF","@value":"10.1126/science.1246518_references_DOI_EKKcIlNAFf3HqN0yxtOTiTS8DUr"},{"@type":"CROSSREF","@value":"10.1029/2024jb030268_references_DOI_RMWjygQ4py9v5cbonjCDwDyuNLw"},{"@type":"CROSSREF","@value":"10.1016/j.epsl.2014.06.010_references_DOI_EKKcIlNAFf3HqN0yxtOTiTS8DUr"},{"@type":"CROSSREF","@value":"10.1186/s40645-022-00524-0_references_DOI_EKKcIlNAFf3HqN0yxtOTiTS8DUr"},{"@type":"CROSSREF","@value":"10.1016/j.epsl.2013.03.009_references_DOI_EKKcIlNAFf3HqN0yxtOTiTS8DUr"},{"@type":"CROSSREF","@value":"10.1029/2018jb017043_references_DOI_EKKcIlNAFf3HqN0yxtOTiTS8DUr"}]}