{"@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/1364233268446252928.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1029/2005jb003894"}},{"identifier":{"@type":"URI","@value":"http://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2005JB003894"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2005JB003894"}}],"dc:title":[{"@value":"Implications of deformation following the 2002 Denali, Alaska, earthquake for postseismic relaxation processes and lithospheric rheology"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>During the first 2 years following the 2002 <jats:italic>M</jats:italic><jats:sub><jats:italic>w</jats:italic></jats:sub> = 7.9 Denali, Alaska, strike‐slip earthquake, a large array of Global Positioning System (GPS) receivers recorded rapid postseismic surface motions extending at least 300 km from the rupture and at rates of more than 100 mm/yr in the near field. Here we use three‐dimensional (3‐D) viscoelastic finite element models to infer the mechanisms responsible for these postseismic observations. We consider afterslip both from an inversion of GPS displacements and from stress‐driven forward models, poroelastic rebound, and viscoelastic flow in the lower crust and upper mantle. Several conclusions can be drawn: (1) No single mechanism can explain the postseismic observations. (2) Significant postseismic flow below a depth of 60 km is required to explain observed far‐field motions, best explained by a weak upper mantle with a depth‐dependent effective viscosity that ranges from >10<jats:sup>19</jats:sup> Pa s at the Moho (50 km depth) to 3–4 × 10<jats:sup>18</jats:sup> Pa s at 100 km depth. (3) Shallow afterslip within the upper crust occurs adjacent to and beneath the regions of largest coseismic slip. (4) There is a contribution from deformation in the middle and lower crust from either lower crustal flow or stress‐driven slip. Afterslip is preferred over broad viscoelastic flow owing to the existence of seismic velocity discontinuities across the fault at depth, though our modeling does not favor either mechanism. If the process is viscoelastic relaxation, the viscosity is a factor of 3 greater than the inferred mantle viscosity. (5) Poroelastic rebound probably contributed to the observed postseismic deformation in the immediate vicinity of the Denali/Totschunda junction. These conclusions lead us to infer an Alaskan mechanical lithosphere that is about 60 km thick, overlying a weak asthenosphere, and a Denali fault that cuts through the entire lithosphere with shear accommodated by faulting in the top ∼20 km and time‐dependent aseismic shear below.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1384233268446253058","@type":"Researcher","foaf:name":[{"@value":"Andrew M. Freed"}],"jpcoar:affiliationName":[{"@value":"Department of Earth and Atmospheric Sciences Purdue University  West Lafayette Indiana USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1384233268446252928","@type":"Researcher","foaf:name":[{"@value":"Roland Bürgmann"}],"jpcoar:affiliationName":[{"@value":"Department of Earth and Planetary Science University of California Berkeley  Berkeley California USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1384233268446252929","@type":"Researcher","foaf:name":[{"@value":"Eric Calais"}],"jpcoar:affiliationName":[{"@value":"Department of Earth and Atmospheric Sciences Purdue University  West Lafayette Indiana USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1384233268446253057","@type":"Researcher","foaf:name":[{"@value":"Jeff Freymueller"}],"jpcoar:affiliationName":[{"@value":"Geophysical Institute University of Alaska Fairbanks  Fairbanks Alaska USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1384233268446253056","@type":"Researcher","foaf:name":[{"@value":"Sigrún Hreinsdóttir"}],"jpcoar:affiliationName":[{"@value":"Geophysical Institute University of Alaska Fairbanks  Fairbanks Alaska USA"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"01480227"}],"prism:publicationName":[{"@value":"Journal of Geophysical Research: Solid Earth"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2006-01","prism:volume":"111","prism:number":"B1","prism:startingPage":"B01401"},"reviewed":"false","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"http://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2005JB003894"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2005JB003894"}],"createdAt":"2006-01-12","modifiedAt":"2023-10-13","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050564285794447232","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Characteristics of postseismic deformation following the 2003 Tokachi-oki earthquake and estimation of the viscoelastic structure in Hokkaido, northern Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360002214349883520","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Stress‐driven relaxation of heterogeneous upper mantle and time‐dependent afterslip following the 2011 Tohoku earthquake"}]},{"@id":"https://cir.nii.ac.jp/crid/1360286993150092288","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Evidence of Changes of Seismic Properties in the Entire Crust Beneath Japan After the <i>M</i><sub><i>w</i></sub> 9.0, 2011 Tohoku‐oki Earthquake"}]},{"@id":"https://cir.nii.ac.jp/crid/1360294643736032512","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Bayesian Inversion for a Stress‐Driven Model of Afterslip and Viscoelastic Relaxation: Method and Application to Postseismic Deformation Following the 2011 <i>M</i><sub><i>W</i></sub> 9.0 Tohoku‐Oki Earthquake"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567186250363776","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Global Positioning System (GPS) and GPS-Acoustic Observations: Insight into Slip Along the Subduction Zones Around Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360846640349255936","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Postseismic relaxation due to Bhuj earthquake on January 26, 2001: possible mechanisms and processes"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206240339712","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Rheological profile across the northeastern Japan lithosphere toward precise modeling of the 2011 Tohoku Oki Earthquake"},{"@language":"ja","@value":"東日本太平洋沖地震後の余効変動解析へ向けた東北日本弧レオロジー断面"},{"@language":"ja-Kana","@value":"ヒガシニホン タイヘイヨウオキ ジシン ゴ ノ ヨコウヘンドウ カイセキ エ ムケタ トウホク ニホン コ レオロジー ダンメン"}]},{"@id":"https://cir.nii.ac.jp/crid/2051151842066368640","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Heterogeneous rheology of Japan subduction zone revealed by postseismic deformation of the 2011 Tohoku-oki earthquake"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1029/2005jb003894"},{"@type":"CROSSREF","@value":"10.1002/2015jb012508_references_DOI_9yawgnedBXzP3ajnyQrw91km0f0"},{"@type":"CROSSREF","@value":"10.1146/annurev-earth-060313-054614_references_DOI_9yawgnedBXzP3ajnyQrw91km0f0"},{"@type":"CROSSREF","@value":"10.5575/geosoc.2012.0026_references_DOI_9yawgnedBXzP3ajnyQrw91km0f0"},{"@type":"CROSSREF","@value":"10.1029/2019jb017803_references_DOI_9yawgnedBXzP3ajnyQrw91km0f0"},{"@type":"CROSSREF","@value":"10.1029/2020jb021620_references_DOI_9yawgnedBXzP3ajnyQrw91km0f0"},{"@type":"CROSSREF","@value":"10.1186/s40623-016-0533-y_references_DOI_9yawgnedBXzP3ajnyQrw91km0f0"},{"@type":"CROSSREF","@value":"10.1186/s40645-023-00539-1_references_DOI_9yawgnedBXzP3ajnyQrw91km0f0"},{"@type":"CROSSREF","@value":"10.1007/s11069-012-0184-7_references_DOI_9yawgnedBXzP3ajnyQrw91km0f0"}]}