{"@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/1360848658460187008.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1038/srep13069"}},{"identifier":{"@type":"URI","@value":"https://www.nature.com/articles/srep13069.pdf"}},{"identifier":{"@type":"URI","@value":"https://www.nature.com/articles/srep13069"}},{"identifier":{"@type":"PMID","@value":"26286468"}},{"identifier":{"@type":"HANDLE","@value":"10533/238161"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"Ten-year helium anomaly prior to the 2014 Mt Ontake eruption"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Abstract</jats:title><jats:p>Mt Ontake in central Japan suddenly erupted on 27<jats:sup>th</jats:sup> September 2014, killing 57 people with 6 still missing. It was a hydro-volcanic eruption and new magmatic material was not detected. There were no precursor signals such as seismicity and edifice inflation. It is difficult to predict hydro-volcanic eruptions because they are local phenomena that only affect a limited area surrounding the explosive vent. Here we report a long-term helium anomaly measured in hot springs close to the central cone. Helium-3 is the most sensitive tracer of magmatic volatiles. We have conducted spatial surveys around the volcano at once per few years since November 1981. The <jats:sup>3</jats:sup>He/<jats:sup>4</jats:sup>He ratios of the closest site to the cone stayed constant until June 2000 and increased significantly from June 2003 to November 2014, while those of distant sites showed no valuable change. These observations suggest a recent re-activation of Mt Ontake and that helium-3 enhancement may have been a precursor of the 2014 eruption. We show that the eruption was ultimately caused by the increased input of magmatic volatiles over a ten-year period which resulted in the slow pressurization of the volcanic conduit leading to the hydro-volcanic event in September 2014.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1420001326232344064","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"50162524"},{"@type":"NRID","@value":"1000050162524"},{"@type":"ORCID","@value":"0000-0002-3305-5644"},{"@type":"CINII_AUTHOR_ID","@value":"DA1700323X"},{"@type":"URI","@value":"https://ci.nii.ac.jp/author/DA1700323X#entity"},{"@type":"URI","@value":"https://viaf.org/viaf/NII%7CDA1700323X"},{"@type":"NRID","@value":"9000398624532"},{"@type":"NRID","@value":"9000288834073"},{"@type":"NRID","@value":"9000018986862"},{"@type":"NRID","@value":"9000288834077"},{"@type":"NRID","@value":"9000257917759"},{"@type":"NRID","@value":"9000367411249"},{"@type":"NRID","@value":"9000367417847"},{"@type":"NRID","@value":"9000347166867"},{"@type":"NRID","@value":"9000254578939"},{"@type":"NRID","@value":"9000254578791"},{"@type":"NRID","@value":"9000254146702"},{"@type":"NRID","@value":"9000406039397"},{"@type":"NRID","@value":"9000258405217"},{"@type":"NRID","@value":"9000370282006"},{"@type":"NRID","@value":"9000347188928"},{"@type":"NRID","@value":"9000411508641"},{"@type":"NRID","@value":"9000329894246"},{"@type":"NRID","@value":"9000001583663"},{"@type":"NRID","@value":"9000257916614"},{"@type":"NRID","@value":"9000257916837"},{"@type":"NRID","@value":"9000015731864"},{"@type":"NRID","@value":"9000388514981"},{"@type":"NRID","@value":"9000370282280"},{"@type":"NRID","@value":"9000347188583"},{"@type":"NRID","@value":"9000347167130"},{"@type":"NRID","@value":"9000254579764"},{"@type":"NRID","@value":"9000257916771"},{"@type":"NRID","@value":"9000250752447"},{"@type":"NRID","@value":"9000345260455"},{"@type":"NRID","@value":"9000254146088"},{"@type":"NRID","@value":"9000254146996"},{"@type":"NRID","@value":"9000409878173"},{"@type":"NRID","@value":"9000001769472"},{"@type":"NRID","@value":"9000254146183"},{"@type":"NRID","@value":"9000258406867"},{"@type":"NRID","@value":"9000002108605"},{"@type":"NRID","@value":"9000244879659"},{"@type":"NRID","@value":"9000283904710"},{"@type":"NRID","@value":"9000254579053"},{"@type":"NRID","@value":"9000258406648"},{"@type":"NRID","@value":"9000021769286"},{"@type":"NRID","@value":"9000370281659"},{"@type":"NRID","@value":"9000283904500"},{"@type":"NRID","@value":"9000254147019"},{"@type":"NRID","@value":"9000240540329"},{"@type":"NRID","@value":"9000370280929"},{"@type":"NRID","@value":"9000283906194"},{"@type":"NRID","@value":"9000254578590"},{"@type":"NRID","@value":"9000396096595"},{"@type":"NRID","@value":"9000243765794"},{"@type":"NRID","@value":"9000001855349"},{"@type":"NRID","@value":"9000336758163"},{"@type":"NRID","@value":"9000386338295"},{"@type":"NRID","@value":"9000301715034"},{"@type":"NRID","@value":"9000336058095"},{"@type":"NRID","@value":"9000001237668"},{"@type":"NRID","@value":"9000347188885"},{"@type":"NRID","@value":"9000345249154"},{"@type":"NRID","@value":"9000248220255"},{"@type":"NRID","@value":"9000263058856"},{"@type":"NRID","@value":"9000018667531"},{"@type":"NRID","@value":"9000370281092"},{"@type":"NRID","@value":"9000370281409"},{"@type":"NRID","@value":"9000406040255"},{"@type":"NRID","@value":"9000257787384"},{"@type":"NRID","@value":"9000241634816"},{"@type":"NRID","@value":"9000380967167"},{"@type":"NRID","@value":"9000347191611"},{"@type":"NRID","@value":"9000254578431"},{"@type":"NRID","@value":"9000403551062"},{"@type":"NRID","@value":"9000258406982"},{"@type":"NRID","@value":"9000392869539"},{"@type":"NRID","@value":"9000290381605"},{"@type":"NRID","@value":"9000370282207"},{"@type":"NRID","@value":"9000347188861"},{"@type":"NRID","@value":"9000347187904"},{"@type":"NRID","@value":"9000347187634"},{"@type":"NRID","@value":"9000254270938"},{"@type":"NRID","@value":"9000399227604"},{"@type":"NRID","@value":"9000283296819"},{"@type":"NRID","@value":"9000257788325"},{"@type":"NRID","@value":"9000404345942"},{"@type":"NRID","@value":"9000257916528"},{"@type":"NRID","@value":"9000265249757"},{"@type":"NRID","@value":"9000019219899"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/yuji_sano"}],"foaf:name":[{"@value":"Yuji 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Takahata"}]},{"@id":"https://cir.nii.ac.jp/crid/1420845751142866944","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"70373462"},{"@type":"NRID","@value":"1000070373462"},{"@type":"ORCID","@value":"0000-0001-8023-5050"},{"@type":"NRID","@value":"9000398624541"},{"@type":"NRID","@value":"9000370281664"},{"@type":"NRID","@value":"9000283906296"},{"@type":"NRID","@value":"9000258408346"},{"@type":"NRID","@value":"9000004602235"},{"@type":"NRID","@value":"9000258406160"},{"@type":"NRID","@value":"9000283905465"},{"@type":"NRID","@value":"9000015731861"},{"@type":"NRID","@value":"9000254579763"},{"@type":"NRID","@value":"9000257916415"},{"@type":"NRID","@value":"9000414390081"},{"@type":"NRID","@value":"9000283903916"},{"@type":"NRID","@value":"9000283906797"},{"@type":"NRID","@value":"9000347190827"},{"@type":"NRID","@value":"9000345439058"},{"@type":"NRID","@value":"9000258406866"},{"@type":"NRID","@value":"9000347187657"},{"@type":"NRID","@value":"9000258404165"},{"@type":"NRID","@value":"9000283904498"},{"@type":"NRID","@value":"9000347136042"},{"@type":"NRID","@value":"9000253155249"},{"@type":"NRID","@value":"9000254147027"},{"@type":"NRID","@value":"9000401431078"},{"@type":"NRID","@value":"9000258405651"},{"@type":"NRID","@value":"9000001471423"},{"@type":"NRID","@value":"9000262362902"},{"@type":"NRID","@value":"9000283728097"},{"@type":"NRID","@value":"9000347136050"},{"@type":"NRID","@value":"9000405524058"},{"@type":"NRID","@value":"9000258409516"},{"@type":"NRID","@value":"9000338418957"},{"@type":"NRID","@value":"9000283908618"},{"@type":"NRID","@value":"9000283906010"},{"@type":"NRID","@value":"9000347188293"},{"@type":"NRID","@value":"9000398987624"},{"@type":"NRID","@value":"9000258403424"},{"@type":"NRID","@value":"9000283340494"},{"@type":"NRID","@value":"9000338418913"},{"@type":"NRID","@value":"9000283908486"},{"@type":"NRID","@value":"9000283908254"},{"@type":"NRID","@value":"9000000264775"},{"@type":"NRID","@value":"9000283907638"},{"@type":"NRID","@value":"9000345296304"},{"@type":"NRID","@value":"9000345439062"},{"@type":"NRID","@value":"9000257787382"},{"@type":"NRID","@value":"9000345428049"},{"@type":"NRID","@value":"9000397705392"},{"@type":"NRID","@value":"9000258222998"},{"@type":"NRID","@value":"9000257788328"},{"@type":"NRID","@value":"9000370281596"},{"@type":"NRID","@value":"9000258408484"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/read0209084"}],"foaf:name":[{"@value":"Yoshiro Nishio"}]},{"@id":"https://cir.nii.ac.jp/crid/1380848658460187273","@type":"Researcher","foaf:name":[{"@value":"Emilie Roulleau"}]},{"@id":"https://cir.nii.ac.jp/crid/1380848658460187136","@type":"Researcher","foaf:name":[{"@value":"Daniele L. Pinti"}]},{"@id":"https://cir.nii.ac.jp/crid/1380848658460187274","@type":"Researcher","foaf:name":[{"@value":"Tobias P. Fischer"}]}],"contributor":[{"@id":"https://cir.nii.ac.jp/crid/1892835442974106753","@type":"Researcher","foaf:name":[{"@value":"Andean Geothermal Center of Excellence (CEGA), Universidad de Chile"}]},{"@id":"https://cir.nii.ac.jp/crid/1892835442974106762","@type":"Researcher","foaf:name":[{"@value":"Department of Geology, Universidad de Chile"}]},{"@id":"https://cir.nii.ac.jp/crid/1892835442974106759","@type":"Researcher","foaf:name":[{"@value":"Laboratoire de Géochronologie Multi-techniques ; Université Paris-Sud - Paris 11 (UP11)"}]},{"@id":"https://cir.nii.ac.jp/crid/1892835442974106758","@type":"Researcher","foaf:name":[{"@value":"Atmosphere and Ocean Research Institute [Kashiwa-shi] (AORI) ; The University of Tokyo (UTokyo)"}]}],"publication":{"publicationIdentifier":[{"@type":"EISSN","@value":"20452322"}],"prism:publicationName":[{"@value":"Scientific Reports"}],"dc:publisher":[{"@value":"Springer Science and Business Media LLC"}],"prism:publicationDate":"2015-08-19","prism:volume":"5","prism:number":"1","prism:startingPage":"13069"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","dc:rights":["https://creativecommons.org/licenses/by/4.0","https://creativecommons.org/licenses/by/4.0"],"url":[{"@id":"https://www.nature.com/articles/srep13069.pdf"},{"@id":"https://www.nature.com/articles/srep13069"}],"createdAt":"2015-08-19","modifiedAt":"2023-01-05","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=Earthquake","dc:title":"Earthquake"},{"@id":"https://cir.nii.ac.jp/all?q=Magma","dc:title":"Magma"},{"@id":"https://cir.nii.ac.jp/all?q=Colombia","dc:title":"Colombia"},{"@id":"https://cir.nii.ac.jp/all?q=Carbon","dc:title":"Carbon"},{"@id":"https://cir.nii.ac.jp/all?q=Article","dc:title":"Article"},{"@id":"https://cir.nii.ac.jp/all?q=Japan","dc:title":"Japan"},{"@id":"https://cir.nii.ac.jp/all?q=%5BSDU.STU.GC%5DSciences%20of%20the%20Universe%20%5Bphysics%5D/Earth%20Sciences/Geochemistry","dc:title":"[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry"},{"@id":"https://cir.nii.ac.jp/all?q=Isotope%20Systematics","dc:title":"Isotope Systematics"},{"@id":"https://cir.nii.ac.jp/all?q=%5BSDU.STU.VO%5DSciences%20of%20the%20Universe%20%5Bphysics%5D/Earth%20Sciences/Volcanology","dc:title":"[SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/Volcanology"},{"@id":"https://cir.nii.ac.jp/all?q=Gases","dc:title":"Gases"},{"@id":"https://cir.nii.ac.jp/all?q=Secular%20Variations","dc:title":"Secular Variations"},{"@id":"https://cir.nii.ac.jp/all?q=Volcano","dc:title":"Volcano"}],"project":[{"@id":"https://cir.nii.ac.jp/crid/1040000781823646336","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"15H01146"},{"@type":"JGN","@value":"JP15H01146"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PUBLICLY-15H01146/"}],"notation":[{"@language":"ja","@value":"多元素同位体指標を用いた西南日本前弧の海底泥火山流体の起源の解明"}]},{"@id":"https://cir.nii.ac.jp/crid/1040000782321913728","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"26900002"},{"@type":"JGN","@value":"JP26900002"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-26900002/"}],"notation":[{"@language":"ja","@value":"２０１４年御嶽山噴火に関する総合調査"},{"@language":"en","@value":"Comprehensive study of the Eruption of Ontake volcano in 2014"}]},{"@id":"https://cir.nii.ac.jp/crid/1040000782437831424","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"13J06922"},{"@type":"JGN","@value":"JP13J06922"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13J06922/"}],"notation":[{"@language":"ja","@value":"地球表層における揮発性元素の物質循環および大気・海洋の起源と進化に関する研究"}]}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050001339107167232","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Groundwater helium anomaly reflects strain change during the 2016 Kumamoto earthquake in Southwest Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1050025031478354944","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Volcanic plume measurements using a UAV for the 2014 Mt. 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Ontake, central Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1360848656981244160","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Noble gas signals in corals predict submarine volcanic eruptions"}]},{"@id":"https://cir.nii.ac.jp/crid/1360848658048762496","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Instrumentation and Method Development for On-Site Analysis of Helium Isotopes"}]},{"@id":"https://cir.nii.ac.jp/crid/1360855571326358656","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Helium-3 Emission Related to Volcanic Activity"}]},{"@id":"https://cir.nii.ac.jp/crid/1360861704795851904","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Monitoring of magmatic–hydrothermal system by noble gas and carbon isotopic compositions of fumarolic gases"}]},{"@id":"https://cir.nii.ac.jp/crid/1360865815677732864","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"A numerical model for precursory time sequences of the phreatic eruptions of Mt. Ontake, central Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1361418520183048576","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"A review on phreatic eruptions and their precursors"}]},{"@id":"https://cir.nii.ac.jp/crid/1361418521443117568","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Noble Gases in the Atmosphere"}]},{"@id":"https://cir.nii.ac.jp/crid/1361694367879717632","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Mussel Shell Geochemical Analyses Reflect Coastal Environmental Changes Following the 2011 Tohoku Tsunami"}]},{"@id":"https://cir.nii.ac.jp/crid/1361699994937275392","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Report on Unzendake (Japan)"}]},{"@id":"https://cir.nii.ac.jp/crid/1361981469148895616","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Noble 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