{"@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/1362544421005708672.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1029/1999jb900432"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F1999JB900432"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/1999JB900432"}}],"dc:title":[{"@value":"Temporal changes in coda <i>Q</i><sup>−1</sup> and <i>b</i> value due to the static stress change associated with the 1995 Hyogo‐ken Nanbu earthquake"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>The seismicity in the Tamba region, northeast of the Hyogo‐ken Nanbu earthquake in Japan (January 17, 1995; <jats:italic>M</jats:italic><jats:sub>JMA</jats:sub> 7.2), increased significantly following this earthquake. This increase suggests that the static stress change due to a large earthquake causes a change in the crustal condition or dynamics. In order to reveal the changes quantitatively, we investigate the temporal variation in coda <jats:italic>Q</jats:italic><jats:sup>−l</jats:sup> and <jats:italic>b</jats:italic> value in the Tamba region. We analyze the waveform data of many shallow microearthquakes (<jats:italic>M</jats:italic> 1.5–3.0) in the region recorded in a period from 1987 to 1996. Coda <jats:italic>Q</jats:italic><jats:sup>−1</jats:sup> is estimated in 10 frequency bands in a range of 1.5–24 Hz based on the single isotropic scattering model. At frequencies between 1.5 and 4.0 Hz the temporal variation in coda <jats:italic>Q</jats:italic><jats:sup>−1</jats:sup> shows significant correlation with the occurrence of the Hyogo‐ken Nanbu earthquake; coda <jats:italic>Q</jats:italic><jats:sup>−l</jats:sup> increases after the event. A variation in <jats:italic>b</jats:italic> value whose sign is opposite to that of coda <jats:italic>Q</jats:italic><jats:sup>−1</jats:sup> is recognized. The fracture dimensions of microearthquakes that contribute to the variation in <jats:italic>b</jats:italic> value are estimated to be 400 m. This scale length is consistent with the characteristic scale length of scatterer, 300–600 m, which contributes effectively to a temporal variation in coda <jats:italic>Q</jats:italic><jats:sup>−1</jats:sup>. The crustal activity in the Tamba region is possibly controlled by the heterogeneity with dominant scale of 10<jats:sup>2</jats:sup> m. The stress sensitivity of the coda <jats:italic>Q</jats:italic><jats:sup>−1</jats:sup> change is estimated to be 10 (MPa)<jats:sup>−1</jats:sup>. This value is an order of magnitude larger than the stress sensitivity of seismic velocity reported before.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1382544421005708675","@type":"Researcher","foaf:name":[{"@value":"Yoshihiro Hiramatsu"}]},{"@id":"https://cir.nii.ac.jp/crid/1382544421005708673","@type":"Researcher","foaf:name":[{"@value":"Nobuhiko Hayashi"}]},{"@id":"https://cir.nii.ac.jp/crid/1382544421005708672","@type":"Researcher","foaf:name":[{"@value":"Muneyoshi Furumoto"}]},{"@id":"https://cir.nii.ac.jp/crid/1382544421005708674","@type":"Researcher","foaf:name":[{"@value":"Hiroshi Katao"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"01480227"}],"prism:publicationName":[{"@value":"Journal of Geophysical Research: Solid Earth"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2000-03-10","prism:volume":"105","prism:number":"B3","prism:startingPage":"6141","prism:endingPage":"6151"},"reviewed":"false","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F1999JB900432"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/1999JB900432"}],"createdAt":"2002-09-17","modifiedAt":"2023-09-22","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050845760708107136","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Numerical analysis of the relationship between time-variant coda-Q and the variation in crustal stress"}]},{"@id":"https://cir.nii.ac.jp/crid/1360022306713932160","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Low-frequency earthquakes observed in close vicinity of repeating earthquakes in the brittle upper crust of Hakodate, Hokkaido, northern Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360301469292674688","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Upward Earthquake Swarm Migration in the Northeastern Noto Peninsula, Japan, Initiated From a Deep Ring‐Shaped Cluster: Possibility of Fluid Leakage From a Hidden Magma System"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206513448576","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Spatial distribution of atypical aftershocks of the 1995 Hyogo-ken Nanbu earthquake"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206513469696","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Seismological evidence for the brittle-ductile interaction hypothesis on earthquake loading"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206513860736","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Continuous observation of seismic wave velocity and apparent velocity using a precise seismic array and ACROSS seismic source"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282681472883456","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"Coda-Qと弾性体に働く応力との関係—統計量から導く状態量：弾性変位の影響—"},{"@language":"en","@value":"Relation between Coda-Q and stress loaded to an elastic body—parameters of material conditions derived by stochastic measurement: Effect of elastic displacement—"},{"@value":"Coda-Qと弾性体に働く応力との関係--統計量から導く状態量: 弾性変位の影響"},{"@language":"ja-Kana","@value":"Coda Q ト ダンセイタイ ニ ハタラク オウリョク ト ノ カンケイ トウケイリョウ カラ ミチビク ジョウタイリョウ ダンセイ ヘンイ ノ エイキョウ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282681488731648","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Temporal changes in seismic velocity of the crust around Iwate volcano, Japan, as inferred from analyses of repeated active seismic experiment data from 1998 to 2003"},{"@value":"Temporal changes in seismic velocity of the crust around Irate volcano, Japan, as inferred from analyses of repeated active seismic experiment data from 1998 to 2003"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282681490212096","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"A new view of earthquake and volcano precursors"},{"@language":"ja-Kana","@value":"new view of earthquake and volcano precursors"}]},{"@id":"https://cir.nii.ac.jp/crid/2050025942185011200","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Spatial variation in coda Q and stressing rate around the Atotsugawa fault zone in a high strain rate zone, central Japan"}]},{"@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/2051151842043302656","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Source fault model of the 2018 Mw 5.6 northern Osaka earthquake, Japan, inferred from the aftershock sequence"}]},{"@id":"https://cir.nii.ac.jp/crid/2051433317020892288","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Temporal stability of coda Q in the northeastern part of an inland high strain rate zone, central Japan : implication of a persistent ductile deformation in the crust"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1029/1999jb900432"},{"@type":"CROSSREF","@value":"10.1093/gji/ggt243_references_DOI_VWrjz2HKZsma0CP0Ums5v6Mq5vs"},{"@type":"CROSSREF","@value":"10.1186/s40623-019-0995-9_references_DOI_VWrjz2HKZsma0CP0Ums5v6Mq5vs"},{"@type":"CROSSREF","@value":"10.1186/s40623-019-1013-y_references_DOI_VWrjz2HKZsma0CP0Ums5v6Mq5vs"},{"@type":"CROSSREF","@value":"10.5047/eps.2012.08.012_references_DOI_VWrjz2HKZsma0CP0Ums5v6Mq5vs"},{"@type":"CROSSREF","@value":"10.1093/gji/ggaa418_references_DOI_VWrjz2HKZsma0CP0Ums5v6Mq5vs"},{"@type":"CROSSREF","@value":"10.1029/2022jb026047_references_DOI_LiyMe9B16Vj7Mko3xx476ijKZ2T"},{"@type":"CROSSREF","@value":"10.1186/bf03352583_references_DOI_VWrjz2HKZsma0CP0Ums5v6Mq5vs"},{"@type":"CROSSREF","@value":"10.1186/bf03353079_references_DOI_VWrjz2HKZsma0CP0Ums5v6Mq5vs"},{"@type":"CROSSREF","@value":"10.1186/bf03353089_references_DOI_VWrjz2HKZsma0CP0Ums5v6Mq5vs"},{"@type":"CROSSREF","@value":"10.1186/bf03352441_references_DOI_VWrjz2HKZsma0CP0Ums5v6Mq5vs"},{"@type":"CROSSREF","@value":"10.1186/bf03352604_references_DOI_VWrjz2HKZsma0CP0Ums5v6Mq5vs"},{"@type":"CROSSREF","@value":"10.1186/s40623-017-0663-x_references_DOI_VWrjz2HKZsma0CP0Ums5v6Mq5vs"},{"@type":"CROSSREF","@value":"10.3124/segj.63.519_references_DOI_VWrjz2HKZsma0CP0Ums5v6Mq5vs"}]}