{"@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/1361699995909737344.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1029/2020jb020180"}},{"identifier":{"@type":"URI","@value":"https://onlinelibrary.wiley.com/doi/pdf/10.1029/2020JB020180"}},{"identifier":{"@type":"URI","@value":"https://onlinelibrary.wiley.com/doi/full-xml/10.1029/2020JB020180"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2020JB020180"}},{"identifier":{"@type":"DOI","@value":"10.1002/essoar.10503078.2"}},{"identifier":{"@type":"DOI","@value":"10.1002/essoar.10503078.3"}}],"dc:title":[{"@value":"Time‐Lapse Monitoring of Seismic Velocity Associated With 2011 Shinmoe‐Dake Eruption Using Seismic Interferometry: An Extended Kalman Filter Approach"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Abstract</jats:title>\n                  <jats:p>Seismic interferometry is a powerful tool to monitor the seismic velocity change associated with volcanic eruptions. For the monitoring, changes in seismic velocity with environmental origins (such as precipitation) are problematic. In order to model the environmental effects, we propose a new technique based on a state‐space model. An extended Kalman filter estimates seismic velocity changes as state variables, with a first‐order approximation of the stretching method. We apply this technique to three‐component seismic records in order to detect the seismic velocity change associated with the Shinmoe‐dake eruptions in 2011 and 2018. First, ambient noise cross correlations were calculated from May 2010 to April 2018. We also modeled seismic velocity changes resulting from precipitation and the 2016 Kumamoto earthquake, with exponential type responses. Most of the results show no significant changes associated with the eruptions, although gradual inflation of the magma reservoir preceded the 2011 eruption by 1 year. The observed low sensitivity to static stress changes suggests that the fraction of geofluid and crack density at about 1‐km depth is small, and the crack shapes could be circular. Only one station pair west of the crater shows the significant drop associated with the eruption in 2011. The gradual drop of seismic velocity up to 0.05% preceded the eruption by 1 month. When the gradual drop began, volcanic tremors were activated at about 2‐km depth. These observations suggest that the drop could be caused by damage accumulation due to vertical magma migration beneath the summit.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1381699995909737347","@type":"Researcher","foaf:name":[{"@value":"Kiwamu Nishida"}],"jpcoar:affiliationName":[{"@value":"Earthquake Research Institute The University of Tokyo  Tokyo Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699995909737346","@type":"Researcher","foaf:name":[{"@value":"Yuta Mizutani"}],"jpcoar:affiliationName":[{"@value":"Earthquake Research Institute The University of Tokyo  Tokyo Japan"},{"@value":"JX Nippon Oil & Gas Exploration Corp  Tokyo Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699995909737345","@type":"Researcher","foaf:name":[{"@value":"Mie Ichihara"}],"jpcoar:affiliationName":[{"@value":"Earthquake Research Institute The University of Tokyo  Tokyo Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699995909737344","@type":"Researcher","foaf:name":[{"@value":"Yosuke Aoki"}],"jpcoar:affiliationName":[{"@value":"Earthquake Research Institute The University of Tokyo  Tokyo Japan"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"21699313"},{"@type":"EISSN","@value":"21699356"}],"prism:publicationName":[{"@value":"Journal of Geophysical Research: Solid Earth"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2020-09","prism:volume":"125","prism:number":"9","prism:startingPage":"e2020JB020180"},"reviewed":"false","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://onlinelibrary.wiley.com/doi/pdf/10.1029/2020JB020180"},{"@id":"https://onlinelibrary.wiley.com/doi/full-xml/10.1029/2020JB020180"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2020JB020180"}],"createdAt":"2020-08-21","modifiedAt":"2023-09-02","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360020312295687552","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"The sequence of the 2017–2018 eruptions and seismo-acoustic activity at Kirishima volcano group"}]},{"@id":"https://cir.nii.ac.jp/crid/1360021396132738944","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Seismic background level growth can reveal slowly developing long-term eruption precursors"}]},{"@id":"https://cir.nii.ac.jp/crid/1360025429428414592","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Estimation of seismometer clock time offsets using Kalman Filter towards accurate seismic velocity change"}]},{"@id":"https://cir.nii.ac.jp/crid/1360290617901423744","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Unexpected Consequences of Transverse Isotropy"}]},{"@id":"https://cir.nii.ac.jp/crid/1360298757432558720","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Seismic Scattering Property Changes Correlate With Ground Deformation at Suwanosejima Volcano, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360580230631484928","@type":"Article","resourceType":"学術雑誌論文(journal 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