{"@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/1390282679280420352.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.4294/zisin1948.33.3_343"}},{"identifier":{"@type":"NDL_BIB_ID","@value":"2293258"}},{"identifier":{"@type":"URI","@value":"http://id.ndl.go.jp/bib/2293258"}},{"identifier":{"@type":"URI","@value":"https://ndlsearch.ndl.go.jp/books/R000000004-I2293258"}},{"identifier":{"@type":"URI","@value":"https://www.jstage.jst.go.jp/article/zisin1948/33/3/33_3_343/_pdf"}},{"identifier":{"@type":"NAID","@value":"130006784584"}},{"identifier":{"@type":"NAID","@value":"40001526057"}}],"dc:title":[{"@language":"ja","@value":"孔井用傾斜計による地殻傾斜観測方式の開発"},{"@language":"en","@value":"Development of the Crustal Tilt Observation Method Using Borehole-type Tiltmeters"},{"@language":"ja-Kana","@value":"コウセイヨウ ケイシャケイ ニヨル チカク ケイシャ カンソク ホウシキ ノ"}],"description":[{"type":"abstract","notation":[{"@language":"en","@value":"Continuous monitoring of the crustal tilt is one of the most effective approaches for the purpose of earthquake prediction. Drilling a borehole is not so expensive as construction of an underground vault, which is necessary for installation of water-tube tiltmeters and horizontal pendulum tiltmeters, and a borehole station is possible to be made even in a plain area. The National Research Center for Disaster Prevention has not only developed the boreholetype tiltmeter itself but has improved borehole drilling techniques and installation methods for the tiltmeter. The force-balanced pendulum tiltmeter developed for down-hole observation is installed at the bottom of the borehole of which the depth is about 100m. The measuring range is ±2×10<sup>-4</sup> radian, the resolution is 6×10<sup>-9</sup> radian, and the long term drift is smaller than a few micro-radian per year after half a year since the installation. Clear records of the earth tides demonstrate the high quality of the instrument. Tilt changes of the order of micro-radian caused by precipitation are remarkable in the data of some stations. But, the crustal tilt observation by using borehole-type tiltmeters is expected to be very effective for detecting anomalous tilt changes of the order of 5×10<sup>-8</sup> radian per day with a time constant of several hours to several tens of days."}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1030003658359693184","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"80225987"},{"@type":"NRID","@value":"1000080225987"},{"@type":"NRID","@value":"9000254741602"},{"@type":"NRID","@value":"9000001756489"},{"@type":"NRID","@value":"9000391400944"},{"@type":"NRID","@value":"9000254753218"},{"@type":"NRID","@value":"9000254262897"},{"@type":"NRID","@value":"9000254753429"},{"@type":"NRID","@value":"9000004143028"},{"@type":"NRID","@value":"9000391405974"},{"@type":"NRID","@value":"9000254741550"},{"@type":"NRID","@value":"9000391405306"},{"@type":"NRID","@value":"9000014234080"},{"@type":"NRID","@value":"9000254741082"},{"@type":"NRID","@value":"9000254271113"},{"@type":"NRID","@value":"9000254741826"},{"@type":"NRID","@value":"9000391401891"},{"@type":"NRID","@value":"9000391406210"},{"@type":"NRID","@value":"9000014233847"},{"@type":"NRID","@value":"9000023655567"},{"@type":"NRID","@value":"9000257978880"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/read0168849"}],"foaf:name":[{"@language":"ja","@value":"佐藤 春夫"},{"@language":"en","@value":"SATO Haruo"}],"jpcoar:affiliationName":[{"@language":"en","@value":"National Research Center for Disaster Prevention"},{"@language":"ja","@value":"国立防災科学技術センター"}]},{"@id":"https://cir.nii.ac.jp/crid/1410282679280420352","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000391401893"}],"foaf:name":[{"@language":"ja","@value":"山本 英二"},{"@language":"en","@value":"YAMAMOTO Eiji"}],"jpcoar:affiliationName":[{"@language":"en","@value":"National Research Center for Disaster Prevention"},{"@language":"ja","@value":"国立防災科学技術センター"}]},{"@id":"https://cir.nii.ac.jp/crid/1410282679280420353","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000391401895"}],"foaf:name":[{"@language":"ja","@value":"上原 正義"},{"@language":"en","@value":"UEHARA Masayoshi"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Akashi Seisakusho Ltd."},{"@language":"ja","@value":"明石製作所株式会社"}]},{"@id":"https://cir.nii.ac.jp/crid/1410282679280420354","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000391401896"}],"foaf:name":[{"@language":"ja","@value":"寺沢 康夫"},{"@language":"en","@value":"TERASAWA Yasuo"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Sumiko Consultant Co. Ltd."},{"@language":"ja","@value":"住鉱コンサルタント株式会社"}]},{"@id":"https://cir.nii.ac.jp/crid/1410282679280420355","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000391401165"}],"foaf:name":[{"@language":"ja","@value":"高橋 博"},{"@language":"en","@value":"TAKAHASHI Hiroshi"}],"jpcoar:affiliationName":[{"@language":"en","@value":"National Research Center for Disaster Prevention"},{"@language":"ja","@value":"国立防災科学技術センター"}]},{"@id":"https://cir.nii.ac.jp/crid/1410282679280420357","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000391401894"}],"foaf:name":[{"@language":"ja","@value":"福尾 信平"},{"@language":"en","@value":"FUKUO Nobuhei"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Akashi Seisakusho Ltd."},{"@language":"ja","@value":"明石製作所株式会社"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00371114"},{"@type":"LISSN","@value":"00371114"},{"@type":"EISSN","@value":"18839029"},{"@type":"EISSN","@value":"2186599X"},{"@type":"NDL_BIB_ID","@value":"000000009860"},{"@type":"ISSN","@value":"00371114"},{"@type":"NCID","@value":"AN00305741"}],"prism:publicationName":[{"@language":"en","@value":"Zisin (Journal of the Seismological Society of Japan. 2nd ser.)"},{"@language":"ja","@value":"地震　第２輯"},{"@value":"地震　第2輯"},{"@language":"ja","@value":"地震"},{"@language":"ja","@value":"地震　第２輯"},{"@language":"en","@value":"JSSJ"},{"@language":"en","@value":"Zisin"},{"@language":"en","@value":"BSSJ"},{"@language":"en","@value":"Zisin (Journal of the Seismological Society of Japan. 2nd ser.)"},{"@language":"en","@value":"Zisin1"},{"@language":"ja","@value":"地震１"},{"@language":"ja","@value":"地震　第１輯"}],"dc:publisher":[{"@language":"en","@value":"SEISMOLOGICAL SOCIETY OF JAPAN"},{"@language":"ja","@value":"公益社団法人 日本地震学会"}],"prism:publicationDate":"1980","prism:volume":"33","prism:number":"3","prism:startingPage":"343","prism:endingPage":"368"},"reviewed":"false","url":[{"@id":"http://id.ndl.go.jp/bib/2293258"},{"@id":"https://ndlsearch.ndl.go.jp/books/R000000004-I2293258"},{"@id":"https://www.jstage.jst.go.jp/article/zisin1948/33/3/33_3_343/_pdf"}],"availableAt":"1980","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050852870543559424","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"The 2018 phreatic eruption at Mt. 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