{"@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/1390282679334741504.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1246/nikkashi.1992.375"}},{"identifier":{"@type":"URI","@value":"https://www.jstage.jst.go.jp/article/nikkashi1972/1992/4/1992_4_375/_pdf"}},{"identifier":{"@type":"NAID","@value":"130004159866"}}],"dc:title":[{"@language":"en","@value":"Radon Anomalies in Ground Water before Earthquakes in Tokyo"},{"@language":"ja","@value":"東京における地震前の地下水ラドン異常"}],"description":[{"type":"abstract","notation":[{"@language":"en","@value":"Radon contents in ground waters in Tokyo have been measured since 1976. The correlation between earthquake and radon anomaly will be evaluated easily, when both earthquakes and radon anomalies are a few. In addition, the high reliability of the correlation will be obtained, if an earthquake and an anomaly occur at almost same time. The six earthquakes occurred in 1976'1990 were chosen based on the magnitude (>6.0) and the epicentral distance (<100 km). Radon anomalies shortly before the six earthquakes were investigated at the stations where few anomalies have been detected. Anomalies which can be considered to relate with earthquakes appeared near around the dates of the Ibaraki-Chiba (1985) and the Yamanashi-Kanagawa (1983) earthquakes. The anomalies appeared in 6 d before-4 d after the earthquakes, and no other anomalies had appeared in over 600 d before the earthquakes. Then it is presumed that these anomalies would be earthquake precursors. The anomalies were found at the stations distributed in 50-70 km epicentral distances and on the compress quadrants of the earthquake mechanism."},{"@language":"ja","@value":"ドン異常東京における地下水中ラドン濃度を1976年から測定してきた。地震とラドン異常の数が両方とも少なければ,相互の関連を評価しやすい。さらに,地震と異常の発生時刻が近け衷ば,相関の信頼性は高い。マグニチュード(＞6.0)と震央距離(＜100km)の条件で,1976～1990年に発生した6件の地震を選択した。異常発生数の少ないラドン観測点において,6件の地震直前の異常を詳細に調べた。茨城千葉県境地震(1985)および山梨神奈州県境地震(1983)の発生日付近に地震に関係すると考えられる異常が現れた。 異常は地震の6日前～4日後に現れ,地震前の600日間以上にわたって他に異常値が見あたらなかった。これらの濃度上昇は前兆現象であった可能性が高い。異常検出観測点は震央距離50～70kmで,発震機構の圧縮寒限に位置していた。"}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1410006973363638784","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000256050489"}],"foaf:name":[{"@language":"en","@value":"SAITO Masaaki"},{"@language":"ja","@value":"斎藤 正明"}],"jpcoar:affiliationName":[{"@language":"ja","@value":"東京都立アイソトープ総合研究所"},{"@language":"en","@value":"Tokyo Metropolitan Isotope Research Center;"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"03694577"},{"@type":"EISSN","@value":"21850925"}],"prism:publicationName":[{"@language":"en","@value":"NIPPON KAGAKU KAISHI"},{"@language":"ja","@value":"日本化学会誌（化学と工業化学）"},{"@language":"en","@value":"Nippon Kagaku Kaishi"},{"@language":"ja","@value":"日化"},{"@language":"en","@value":"NIPPON KAGAKU KAISHI"},{"@language":"ja","@value":"日本化学会誌"}],"dc:publisher":[{"@language":"en","@value":"The Chemical Society of Japan"},{"@language":"ja","@value":"公益社団法人 日本化学会"}],"prism:publicationDate":"1992-04-10","prism:volume":"1992","prism:number":"4","prism:startingPage":"375","prism:endingPage":"382"},"reviewed":"false","url":[{"@id":"https://www.jstage.jst.go.jp/article/nikkashi1972/1992/4/1992_4_375/_pdf"}],"availableAt":"1992-04-10","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=General%20Chemistry","dc:title":"General Chemistry"}],"dataSourceIdentifier":[{"@type":"JALC","@value":"oai:japanlinkcenter.org:0001442748"},{"@type":"CROSSREF","@value":"10.1246/nikkashi.1992.375"},{"@type":"CIA","@value":"130004159866"}]}