{"@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/1360002216709540480.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1029/2012gl051342"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2012GL051342"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2012GL051342"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"Temporal change in shear velocity and polarization anisotropy related to the 2011 M9.0 Tohoku‐Oki earthquake examined using KiK‐net vertical array data"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>The M9.0 Tohoku‐Oki earthquake took place off NE Japan, which is covered by a dense seismic network. In particular, KiK‐net observed the strong motions of the main shock and numerous aftershocks both on the ground and at the bottom of boreholes at a depth of a few hundred meters. We applied cross‐correlation analysis to the coda part of a seismogram observed by KiK‐net and estimated not only the temporal change in shear velocity but also the change in polarization anisotropy between the bottom of the borehole and the ground. The shear velocity was suddenly reduced by 5 to 10% after the Tohoku‐Oki earthquake over a wide area of NE Japan, which is consistent with the results of a previous study. Although some stations also reveal a change in polarization anisotropy, the polarization anisotropy change is smaller than the velocity change, which may suggest that the static stress change due to the coseismic slip on the Pacific plate is not large enough to change the direction of polarization anisotropy and/or deviatoric stress in the land area of NE Japan.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380003444897065088","@type":"Researcher","foaf:name":[{"@value":"Ryota Takagi"}]},{"@id":"https://cir.nii.ac.jp/crid/1420001326219191680","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"30281968"},{"@type":"NRID","@value":"1000030281968"},{"@type":"ORCID","@value":"0000-0002-0334-279X"},{"@type":"NRID","@value":"9000020970954"},{"@type":"NRID","@value":"9000254262646"},{"@type":"NRID","@value":"9000254262652"},{"@type":"NRID","@value":"9000284268603"},{"@type":"NRID","@value":"9000254741781"},{"@type":"NRID","@value":"9000254262900"},{"@type":"NRID","@value":"9000254262643"},{"@type":"NRID","@value":"9000410904518"},{"@type":"NRID","@value":"9000410320352"},{"@type":"NRID","@value":"9000000119743"},{"@type":"NRID","@value":"9000001212862"},{"@type":"NRID","@value":"9000408484407"},{"@type":"NRID","@value":"9000005191168"},{"@type":"NRID","@value":"9000254741743"},{"@type":"NRID","@value":"9000001212872"},{"@type":"NRID","@value":"9000023611239"},{"@type":"NRID","@value":"9000409470223"},{"@type":"NRID","@value":"9000258414494"},{"@type":"NRID","@value":"9000018699101"},{"@type":"NRID","@value":"9000388538969"},{"@type":"NRID","@value":"9000008300536"},{"@type":"NRID","@value":"9000018369126"},{"@type":"NRID","@value":"9000238038283"},{"@type":"NRID","@value":"9000254741829"},{"@type":"NRID","@value":"9000279888034"},{"@type":"NRID","@value":"9000254741756"},{"@type":"NRID","@value":"9000254708737"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/read0211901"}],"foaf:name":[{"@value":"Tomomi Okada"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00948276"},{"@type":"EISSN","@value":"19448007"}],"prism:publicationName":[{"@value":"Geophysical Research Letters"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2012-05","prism:volume":"39","prism:number":"9","prism:startingPage":"L09310"},"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%2F2012GL051342"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2012GL051342"}],"createdAt":"2012-04-13","modifiedAt":"2023-10-30","project":[{"@id":"https://cir.nii.ac.jp/crid/1040282257039539456","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"21109002"},{"@type":"JGN","@value":"JP21109002"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PLANNED-21109002/"}],"notation":[{"@language":"ja","@value":"地震波で診る地殻流体"},{"@language":"en","@value":"Geofluid investigated from seismic waves"}]},{"@id":"https://cir.nii.ac.jp/crid/1040282257468403456","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"11J03229"},{"@type":"JGN","@value":"JP11J03229"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11J03229/"}],"notation":[{"@language":"ja","@value":"地震波干渉法による地殻不均質構造と内陸地震の関係に関する研究"}]}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050001202726476928","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Temporal changes of the crustal structure associated with the M6.1 earthquake on September 3, 1998, and the volcanic activity of Mount Iwate, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1050845760653604352","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Near-surface weakening in Japan after the 2011 Tohoku-Oki earthquake"}]},{"@id":"https://cir.nii.ac.jp/crid/1360002216708238976","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Temporal change of phase velocity beneath Mt. Asama, Japan, inferred from coda wave interferometry"}]},{"@id":"https://cir.nii.ac.jp/crid/1360002216709047552","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Estimating near‐surface shear wave velocities in Japan by applying seismic interferometry to KiK‐net data"}]},{"@id":"https://cir.nii.ac.jp/crid/1360004233288308864","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Stress before and after the 2011 great Tohoku‐oki earthquake and induced earthquakes in inland areas of eastern Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360009142423994240","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"A Decade of Lessons Learned from the 2011 Tohoku‐Oki Earthquake"}]},{"@id":"https://cir.nii.ac.jp/crid/1360283692532997504","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Time-lapse changes of P- and S-wave velocities and shear wave splitting in the first year after the 2011 Tohoku earthquake, Japan: shallow subsurface"}]},{"@id":"https://cir.nii.ac.jp/crid/1360283694838203776","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Time-Lapse Changes of Seismic Velocity in the Shallow Ground Caused by Strong Ground Motion Shock of the 2000 Western-Tottori Earthquake, Japan, as Revealed from Coda Deconvolution Analysis"}]},{"@id":"https://cir.nii.ac.jp/crid/1360285705151917440","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"A temporal change of shear wave anisotropy within the marine sedimentary layer associated with the 2011 Tohoku‐Oki earthquake"}]},{"@id":"https://cir.nii.ac.jp/crid/1360285708268951552","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Shallow Temporal Changes in <i>S</i> Wave Velocity and Polarization Anisotropy Associated With the 2016 Kumamoto Earthquake Sequence, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360285714409329152","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Monitoring temporal changes of seismic properties"}]},{"@id":"https://cir.nii.ac.jp/crid/1360292621388170624","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Surface deformation due to shear and tensile faults in a half-space"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567181097033856","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Auto Correlation Analysis of Coda Waves from Local Earthquakes for Detecting Temporal Changes in Shallow Subsurface Structures: the 2011 Tohoku-Oki, Japan Earthquake"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567186817872256","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Monitoring of seismic velocity structure before and after the 2011 Tohoku-Oki earthquake using array observation of ambient noise"}]},{"@id":"https://cir.nii.ac.jp/crid/1360574095598690816","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Sudden drop of seismic velocity after the 2004 <i>M</i><sub><i>w</i></sub> 6.6 mid‐Niigata earthquake, Japan, observed with Passive Image Interferometry"}]},{"@id":"https://cir.nii.ac.jp/crid/1360848654730673536","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Trench-parallel crustal anisotropy along the trench in the fore-arc region of Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360848659520088960","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Depth-dependence of seismic velocity change associated with the 2011 Tohoku earthquake, Japan, revealed from repeating earthquake analysis and finite-difference wave propagation simulation"}]},{"@id":"https://cir.nii.ac.jp/crid/1360848661794588032","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Velocity reduction in an offshore region after the 2011 Tohoku-Oki earthquake, revealed from ocean-bottom seismic records"}]},{"@id":"https://cir.nii.ac.jp/crid/1360861295372482560","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Short‐Term and Long‐Term Variations in Seismic Velocity at Shallow Depths of the Overriding Plate West of the Japan Trench"}]},{"@id":"https://cir.nii.ac.jp/crid/1360869856031080832","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Anisotropic structure at shallow depths across the Japan Trench"}]},{"@id":"https://cir.nii.ac.jp/crid/1361981469833973248","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Seismic velocity reductions caused by the 2003 Tokachi‐Oki earthquake"}]},{"@id":"https://cir.nii.ac.jp/crid/1363107368532430208","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Application of seismic interferometry to extract P- and S-wave propagation and observation of shear-wave splitting from noise data at Cold Lake, Alberta, Canada"}]},{"@id":"https://cir.nii.ac.jp/crid/1363388843309580032","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"A multiscale study of the mechanisms controlling shear velocity anisotropy in the San Andreas Fault Observatory at Depth"}]},{"@id":"https://cir.nii.ac.jp/crid/1363951793788032000","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Postseismic Relaxation Along the San Andreas Fault at Parkfield from Continuous Seismological Observations"}]},{"@id":"https://cir.nii.ac.jp/crid/1364233268623471104","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Monitoring velocity variations in the crust using earthquake doublets: An application to the Calaveras Fault, California"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001204304281344","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Estimation of Surface Wave Group Velocity beneath the Chukyo Area, Japan"},{"@language":"ja","@value":"中京地域堆積盆地における表面波群速度の推定"},{"@value":"中京地域堆積盆地における表面波群速度の推定 : Hi-net連続地震観測記録を用いた地震波干渉法に基づく検証"},{"@language":"ja-Kana","@value":"チュウキョウ チイキ タイセキ ボンチ ニ オケル ヒョウメンハグン ソクド ノ スイテイ : Hi-net レンゾク ジシン カンソク キロク オ モチイタ ジシンハ カンショウホウ ニ モトズク ケンショウ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206495136512","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"地震波干渉法を用いた近地自然地震Pコーダ波による地殻構造探査"},{"@language":"en","@value":"Subsurface exploration with P-coda of local earthquakes using seismic interferometry"},{"@language":"ja-Kana","@value":"ジシンハ カンショウホウ オ モチイタ キン チ シゼン ジシン Pコーダハ ニ ヨル チカク コウゾウ タンサ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282679284097920","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"大地震に伴う地下構造変化とその回復過程について"},{"@language":"en","@value":"A Review of Subsurface Structure Changes Associated with Large Earthquakes and Its Recovery Process"},{"@language":"ja-Kana","@value":"ダイジシン ニ トモナウ チカ コウゾウ ヘンカ ト ソノ カイフク カテイ ニ ツイテ"}]},{"@id":"https://cir.nii.ac.jp/crid/2050588891962948096","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Spatial variation in coda Q in the northeastern part of Niigata–Kobe Tectonic Zone, central Japan : implication of the cause of a high strain rate zone"}]},{"@id":"https://cir.nii.ac.jp/crid/2050588892138318848","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Spatial distribution and focal mechanisms of aftershocks of the 2011 off the Pacific coast of Tohoku Earthquake"}]},{"@id":"https://cir.nii.ac.jp/crid/2051151842045264896","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Coseismic changes in subsurface structure associated with the 2018 Hokkaido Eastern Iburi Earthquake detected using autocorrelation analysis of ambient seismic noise"}]},{"@id":"https://cir.nii.ac.jp/crid/2051433317068449664","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Coseismic slip distribution of the 2011 off the Pacific coast of Tohoku Earthquake (M 9.0) estimated based on GPS data : was the asperity in Miyagi-oki ruptured？"}]},{"@id":"https://cir.nii.ac.jp/crid/2051996267021875328","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Shallow inland earthquakes in NE Japan possibly triggered by the 2011 off the Pacific coast of Tohoku Earthquake"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1029/2012gl051342"},{"@type":"KAKEN","@value":"PRODUCT-12510828"},{"@type":"KAKEN","@value":"PRODUCT-9347927"},{"@type":"OPENAIRE","@value":"doi_dedup___::dfc69a38da66869b1dc1445aef92aa98"},{"@type":"CROSSREF","@value":"10.4294/zisin.66.127_references_DOI_23ocWapS3FdN4Oqiyz3pcGfl9eg"},{"@type":"CROSSREF","@value":"10.1093/gji/ggs080_references_DOI_23ocWapS3FdN4Oqiyz3pcGfl9eg"},{"@type":"CROSSREF","@value":"10.1002/jgrb.50074_references_DOI_23ocWapS3FdN4Oqiyz3pcGfl9eg"},{"@type":"CROSSREF","@value":"10.3389/feart.2015.00042_references_DOI_9YJtRTP9rvbAA3WQhhYBoFM5Gcn"},{"@type":"CROSSREF","@value":"10.1186/s40623-019-1051-5_references_DOI_9YJtRTP9rvbAA3WQhhYBoFM5Gcn"},{"@type":"CROSSREF","@value":"10.4294/zisin.2016-19_references_DOI_23ocWapS3FdN4Oqiyz3pcGfl9eg"},{"@type":"CROSSREF","@value":"10.1029/2020rg000713_references_DOI_23ocWapS3FdN4Oqiyz3pcGfl9eg"},{"@type":"CROSSREF","@value":"10.1007/s00024-014-0849-0_references_DOI_23ocWapS3FdN4Oqiyz3pcGfl9eg"},{"@type":"CROSSREF","@value":"10.1190/segj112013-115_references_DOI_23ocWapS3FdN4Oqiyz3pcGfl9eg"},{"@type":"CROSSREF","@value":"10.3124/segj.69.249_references_DOI_23ocWapS3FdN4Oqiyz3pcGfl9eg"},{"@type":"CROSSREF","@value":"10.1029/2022jb025262_references_DOI_23ocWapS3FdN4Oqiyz3pcGfl9eg"},{"@type":"CROSSREF","@value":"10.1093/gji/ggv014_references_DOI_23ocWapS3FdN4Oqiyz3pcGfl9eg"},{"@type":"CROSSREF","@value":"10.1002/2013gl058359_references_DOI_23ocWapS3FdN4Oqiyz3pcGfl9eg"},{"@type":"CROSSREF","@value":"10.1186/s40623-017-0663-x_references_DOI_23ocWapS3FdN4Oqiyz3pcGfl9eg"},{"@type":"CROSSREF","@value":"10.1190/segj112013-131_references_DOI_23ocWapS3FdN4Oqiyz3pcGfl9eg"},{"@type":"CROSSREF","@value":"10.1029/2018jb016261_references_DOI_23ocWapS3FdN4Oqiyz3pcGfl9eg"},{"@type":"CROSSREF","@value":"10.1186/s40623-024-02059-8_references_DOI_23ocWapS3FdN4Oqiyz3pcGfl9eg"}]}