{"@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/1362262943476706432.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1016/j.pepi.2004.08.007"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S0031920104002936?httpAccept=text/xml"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:S0031920104002936?httpAccept=text/plain"}},{"identifier":{"@type":"NAID","@value":"30003879865"}}],"dc:title":[{"@value":"Resistivity structure of a seismic gap along the Atotsugawa Fault, Japan"}],"description":[{"notation":[{"@value":"Abstract   Seismicity along the Atotsugawa Fault, located in central Japan, shows a clear heterogeneity. The central segment of the fault with low-seismicity is recognized as a seismic gap, although a lot of micro-earthquakes occur along this fault. In order to elucidate the cause of the heterogeneity in seismicity, the electrical resistivity structure was investigated around the Atotsugawa Fault by using the magnetotelluric (MT) method. The regional geoelectrical strikes are approximately parallel to the fault in a low-frequency range. We constructed two-dimensional resistivity models across the fault using TM-mode MT responses to minimize three-dimensional effects on the modeling process. A smooth inversion algorithm was used, and the static-shifts on the apparent resistivity were corrected in the inversion process.  A shallow, low resistivity zone along the fault is found from the surface to a depth of 1–2 km in the best-fit model across the high-seismicity segment of the fault. On the other hand, the corresponding low resistivity zone along the low-seismicity segment is limited to a shallower depth less than 1 km. The low resistivity zone along the Atotsugawa Fault is possibly due to fluid in the fracture zone; the segment with higher levels of seismicity may have higher fluid content in the fault zone compared with the lower seismicity segment. On a view of the crustal structure, a lateral resistivity variation in a depth range of 3–12 km is found below the fault trace in the high-seismicity segment, while a resistive layer of wide extent is found at a depth of about 5 km below the fault trace in the low-seismicity segment. The resistive layer is explained by less fluid condition and possibly characterized as high rigidity. Differences in the resistivity structures between low and high-seismicity segments of the fault suggest that the seismic gap in the central part of the Atotsugawa Fault may be interpreted as a locked segment. Thus, MT is an effective method in evaluating a cause and future activity of seismic gaps along active faults.  The lower crust appears as a conductive zone beneath the low-seismicity segment, less conductive beneath the high-seismicity segment. Fluid is inferred as a preferable cause of the conductive zone in this study. It is suggested that the conductive lower crust beneath the low-seismicity segment is recognized where fluid is trapped by an impermeable layer in the upper crust. On the other hand, fluid in the lower crust may upwell to the surface along the high-seismicity segment of the fault."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1382262943476706433","@type":"Researcher","foaf:name":[{"@value":"Tada-nori Goto"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262943476706432","@type":"Researcher","foaf:name":[{"@value":"Yasuo Wada"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262943476706435","@type":"Researcher","foaf:name":[{"@value":"Naoto Oshiman"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262943476706434","@type":"Researcher","foaf:name":[{"@value":"Norihiko Sumitomo"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00319201"}],"prism:publicationName":[{"@value":"Physics of the Earth and Planetary Interiors"}],"dc:publisher":[{"@value":"Elsevier BV"}],"prism:publicationDate":"2005-01","prism:volume":"148","prism:number":"1","prism:startingPage":"55","prism:endingPage":"72"},"reviewed":"false","dc:rights":["https://www.elsevier.com/tdm/userlicense/1.0/"],"url":[{"@id":"https://api.elsevier.com/content/article/PII:S0031920104002936?httpAccept=text/xml"},{"@id":"https://api.elsevier.com/content/article/PII:S0031920104002936?httpAccept=text/plain"}],"createdAt":"2004-10-21","modifiedAt":"2023-04-29","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050587981430736000","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Seismicity controlled by resistivity structure : the 2016 Kumamoto earthquakes, Kyushu Island, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360565165998090368","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"The occurrence of graphite-bearing fault rocks in the Atotsugawa fault system, Japan: Origins and implications for fault creep"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567183382680448","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Rapid changes in the electrical state of the 1999 Izmit earthquake rupture zone"}]},{"@id":"https://cir.nii.ac.jp/crid/1360857593651926912","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Electrical Resistivity Structure Around the Atotsugawa Fault, Central Japan, Revealed by a New 2‐D Inversion Method Combining Wideband‐MT and Network‐MT Data Sets"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001204230052352","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Current Research Status and Future of Electromagnetic Survey Methods towards Integrated Analysis with Seismic Methods"},{"@language":"ja","@value":"電磁気法探査（ＥＭ法探査）技術の現状と展望―地震探査との統合型解析に向けて―"},{"@language":"ja-Kana","@value":"デンジキホウ タンサ EMホウ タンサ ギジュツ ノ ゲンジョウ ト テンボウ ジシン タンサ トノ トウゴウガタ カイセキ ニ ムケテ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001204303007488","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Current Topics in Surveys of Electrical Conductivity Structure with the Aid of the Magnetotelluric Method"},{"@language":"ja","@value":"MT法による電気伝導度構造研究の現状"},{"@language":"ja-Kana","@value":"MTホウ ニ ヨル デンキ デンドウド コウゾウ ケンキュウ ノ ゲンジョウ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001205318316544","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Development of the off-Toyohashi seafloor cabled observatory"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206512540800","@type":"Article","relationType":["isReferencedBy","isCitedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Resistivity imaging across the source region of the 2004 Mid-Niigata Prefecture earthquake (M6.8), central Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001288145674880","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Audio-frequency magnetotelluric imaging of the electrical resistivity structure around the Biwako Fault of the Yamasaki fault zone, southwest Japan"},{"@language":"ja","@value":"Audio-frequency Magnetotelluric法による山崎断層帯・琵琶甲断層の地下比抵抗構造"},{"@language":"ja-Kana","@value":"Audio-frequency Magnetotelluricホウ ニ ヨル ヤマザキ ダンソウタイ ・ ビワ コウ ダンソウ ノ チカヒ テイコウ コウゾウ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282679072653184","@type":"Article","resourceType":"学術雑誌論文(journal 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Based on Measurements of Elastic Wave Velocities"},{"@language":"ja","@value":"弾性波速度測定に基づく跡津川断層周辺浅部地殻物質の推定"},{"@language":"ja-Kana","@value":"ダンセイハ ソクド ソクテイ ニ モトズク アト ツガワ ダンソウ シュウヘンセンブ チカク ブッシツ ノ スイテイ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282679282208256","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"跡津川断層周辺における地殻構造と地震活動"},{"@language":"en","@value":"Crustal Structure and Seismic Activity around the Atotsugawa Fault System, Central Honshu, Japan"},{"@language":"ja-Kana","@value":"アト ツガワ ダンソウ シュウヘン ニ オケル チカク コウゾウ ト ジシン カツドウ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282681213869824","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Crush zone structure in a compressional step:"},{"@language":"ja","@value":"圧縮性ステップにおける破砕帯の構造"},{"@value":"圧縮性ステップにおける破砕帯の構造--岐阜県飛騨市の跡津川断層西部の例"},{"@language":"ja-Kana","@value":"アッシュクセイ ステップ ニ オケル ハサイタイ ノ コウゾウ ギフケン ヒダシ ノ アトツガワ ダンソウ セイブ ノ レイ"},{"@value":"Crush zone structure in a compressional step: an example of the western part of the Atotsugawa Fault, Hida City, Gifu Prefecture of Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282681215983616","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Audio-frequency magnetotelluric imaging of the electrical resistivity structure around the Gomura fault in the Tango Peninsula, southwest Japan"},{"@language":"ja","@value":"Audio-frequency Magnetotelluric法による郷村断層周辺の地下比抵抗構造"},{"@language":"ja-Kana","@value":"Audio-frequency Magnetotelluricホウ ニ ヨル ゴウソン ダンソウ シュウヘン ノ チカヒ テイコウ コウゾウ"}]},{"@id":"https://cir.nii.ac.jp/crid/1570854175500109952","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"地層処分における電磁法解析技術の開発(その8) : 中華人民共和国甘粛省北山地域における3次元調査"},{"@language":"en","@value":"Software Development of Electromagnetic method for Site Investigation (Part 8) : 3-D inversion study in Beishan, 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