{"@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/1362262944849047552.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1029/97jb01074"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F97JB01074"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/97JB01074"}},{"identifier":{"@type":"NAID","@value":"80009898068"}}],"dc:title":[{"@value":"Mapping active magma chambers by <i>b</i> values beneath the off‐Ito volcano, Japan"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>The <jats:italic>b</jats:italic> value of the frequency‐magnitude relation, and thus the mean magnitude, in the off‐Ito volcanic area is not uniform based on detailed <jats:italic>b</jats:italic> value tomography using about 10,000 events in an area of 10 km radius and in the upper 15 km of the crust. A high b value anomaly (b=15) below 7 km depth and with a radius of about 2 km, located below the coast southeast of Ito, contrasts with lower values of typically <jats:italic>b</jats:italic>=0.7 north of it and at shallower depths. On the basis of surface deformations, a tensile crack dislocation source was located above 7 km depth. Thus we surmise that the magma chamber in the off‐Ito area was located below 7 km depth. The correlation of a high <jats:italic>b</jats:italic> value anomaly with this model supports our hypothesis that active magma chambers may be mapped by high <jats:italic>b</jats:italic> value anomalies. The magma body may be described as consisting of two parts: a lower, well‐established chamber below 11 km depth and a shallower part (11–7 km depth). The <jats:italic>b</jats:italic> value in the volume surrounding the magma chamber increased from 0.7 during the 1980s to 1.5 during the earthquake swarms of the 1990s. This may reflect a trend of increasing crack density due to the intrusion activity.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1382262944849047552","@type":"Researcher","foaf:name":[{"@value":"Max Wyss"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262944849047553","@type":"Researcher","foaf:name":[{"@value":"Kunihiko Shimazaki"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262944849047554","@type":"Researcher","foaf:name":[{"@value":"Stefan Wiemer"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"01480227"}],"prism:publicationName":[{"@value":"Journal of Geophysical Research: Solid Earth"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"1997-09-10","prism:volume":"102","prism:number":"B9","prism:startingPage":"20413","prism:endingPage":"20422"},"reviewed":"false","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F97JB01074"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/97JB01074"}],"createdAt":"2004-02-03","modifiedAt":"2023-09-23","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360004229800864128","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Space‐time model for repeating earthquakes and analysis of recurrence intervals on the San Andreas Fault near Parkfield, California"}]},{"@id":"https://cir.nii.ac.jp/crid/1360285707500246912","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Related spatio-temporal changes in hypocenters and the b value in the 2017 Kagoshima Bay swarm activity indicating a rise of hot fluids"}]},{"@id":"https://cir.nii.ac.jp/crid/1360848661227083136","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Statistics of Earthquake Activity: Models and Methods for Earthquake Predictability Studies"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001288152760064","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Spatial Variations of b-value around Mount Fuji Influenced by the <i>M</i><sub>j</sub> 6.4 Eastern Shizuoka Earthquake of 15 March 2011"},{"@language":"ja","@value":"静岡県東部地震（2011年3月15日，<i>M</i><sub>j</sub> 6.4）による富士山周辺域のG–R則のb値の空間分布への影響"},{"@value":"静岡県東部地震(2011年3月15日, M[j] 6.4)による富士山周辺域のG-R則のb値の空間分布への影響"},{"@language":"ja-Kana","@value":"シズオカケン トウブ ジシン(2011ネン 3ガツ 15ニチ, M[j] 6.4)ニ ヨル フジサン シュウヘンイキ ノ G-Rソク ノ bチ ノ クウカン ブンプ エ ノ エイキョウ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282679279878784","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"富士山及び箱根火山の膨張歪と低周波地震活動"},{"@language":"en","@value":"Extensional Strains around Mt. Fuji and Hakone Volcano and Low-Frequency Earthquakes"},{"@language":"ja-Kana","@value":"フジサン オヨビ ハコネ カザン ノ ボウチョウ ヒズミ ト テイシュウハ ジシン カツドウ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282679281358080","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"東北日本弧下のマグマ供給源の分布 : b値とS波速度から推定される島弧走向方向の変化"},{"@language":"en","@value":"Along-arc Variation of Magma Source in the Subducted Slab beneath the NE Japan Arc : Estimation from b-value and S-wave Velocity Distributions"},{"@value":"寄書 東北日本弧下のマグマ供給源の分布--b値とS波速度から推定される島弧走行方向の変化"},{"@language":"ja-Kana","@value":"キショ トウホク ニホン コ カ ノ マグマ キョウキュウ ゲン ノ ブンプ bチ ト Sハ ソクド カラ スイテイ サレル シマ コ ソウコウ ホウコウ ノ ヘンカ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282679282525312","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"2000年三宅島・神津島・新島付近の群発地震活動におけるb値の空間分布と時間変化"},{"@language":"en","@value":"Spatio-temporal Variation of the b-value for the 2000 Swarm Activity near Miyake, Kozu and Nii-jima Islands"},{"@language":"ja-Kana","@value":"2000ネン ミヤケジマ コウヅシマ ニイジマ フキン ノ グンパツ ジシン カツドウ ニ オケル bチ ノ クウカン ブンプ ト ジカン ヘンカ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282679283752704","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"伊豆半島東方沖で起こる群発地震のフラクタル次元と<i>b</i>値の関係"},{"@language":"en","@value":"Relationship between Fractal Dimension and <i>b</i>-value for Swarm Earthquakes Which Occurred off Eastern Coast of Izu Peninsula, Central Japan"},{"@value":"伊豆半島東方沖で起こる群発地震のフラクタル次元とb値の関係"},{"@language":"ja-Kana","@value":"イズ ハントウ トウホウオキ デ オコル グンパツ ジシン ノ フラクタルジゲン ト bチ ノ カンケイ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282681488921216","@type":"Article","relationType":["isReferencedBy","isCitedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Spatial analysis of the frequency-magnitude distribution and decay rate of aftershock activity of the 2000 Western Tottori earthquake"}]},{"@id":"https://cir.nii.ac.jp/crid/1390845713016251008","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Relationship Between <b><i>b</i></b>-Value Distribution and the Magma Plumbing System in and Around Mt. Tarumae, Japan"},{"@value":"Relationship Between b-Value Distribution and the Magma Plumbing System in and Around Mt. Tarumae, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/2050870367119613824","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Preparatory and precursory processes leading up to the 2014 phreatic eruption of Mount Ontake, Japan"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1029/97jb01074"},{"@type":"CIA","@value":"80009898068"},{"@type":"CROSSREF","@value":"10.1002/2013jb010558_references_DOI_H3pRq4wCFZYlap7ywVOmABiiu6B"},{"@type":"CROSSREF","@value":"10.1016/j.tecto.2018.10.023_references_DOI_H3pRq4wCFZYlap7ywVOmABiiu6B"},{"@type":"CROSSREF","@value":"10.1186/bf03352077_references_DOI_H3pRq4wCFZYlap7ywVOmABiiu6B"},{"@type":"CROSSREF","@value":"10.1186/s40623-015-0288-x_references_DOI_H3pRq4wCFZYlap7ywVOmABiiu6B"},{"@type":"CROSSREF","@value":"10.5026/jgeography.128.377_references_DOI_H3pRq4wCFZYlap7ywVOmABiiu6B"},{"@type":"CROSSREF","@value":"10.20965/jdr.2017.p0932_references_DOI_H3pRq4wCFZYlap7ywVOmABiiu6B"},{"@type":"CROSSREF","@value":"10.1146/annurev-earth-063016-015918_references_DOI_H3pRq4wCFZYlap7ywVOmABiiu6B"}]}