{"@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/1360004240189458560.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.5194/angeo-36-1419-2018"}},{"identifier":{"@type":"URI","@value":"https://angeo.copernicus.org/articles/36/1419/2018/angeo-36-1419-2018.pdf"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"Revisiting substorm events with preonset aurora"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>Abstract. Nishimura et al. (2010) proposed a new plasma intrusion or preonset aurora\nscenario of substorm triggering. In this scenario, a substorm is triggered by\na fast earthward flow generated at the distant neutral line which corresponds\nto a preonset auroral streamer or arc in the ionosphere propagating from the\nauroral poleward boundary to the initial auroral brightening site, i.e.,\n“preonset aurora”. In the present paper, we revisited three substorm events\nreported as being triggered by such a mechanism related to preonset auroras,\nbased on THEMIS ground-based all-sky imager data. Unlike previous studies, we\nexamined the arrival timing of the preonset aurora relative to the three\nsteps of auroral onset arc development (initial brightening, enhancement of\nthe wave-like structure, and poleward expansion) to make the role of the\npreonset aurora in the auroral steps clearer. Our detailed timing analysis\nfound that preonset auroral streamers reached the auroral onset arc but away\nfrom the initial brightening site after initial brightening for two events,\nwhile no preonset aurora reaching the initial brightening site could be\nidentified for the other event. This result suggests that the processes\nassociated with auroral streamers are unlikely to affect at least initial\nbrightening, even if we consider not only the presence and arrival timing and\nlocation of the auroral streamers but also the scale of the corresponding\nflow and flow vortices. We list a series of open questions for testing the\npreonset aurora scenario further in future studies.  Keywords. Magnetospheric physics (storms and substorms; auroral phenomena; magnetotail) \n                    </jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380004240189458688","@type":"Researcher","foaf:name":[{"@value":"Yukinaga Miyashita"}]},{"@id":"https://cir.nii.ac.jp/crid/1420845751165007616","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"70362209"},{"@type":"NRID","@value":"1000070362209"},{"@type":"NRID","@value":"9000279889955"},{"@type":"NRID","@value":"9000408826862"},{"@type":"NRID","@value":"9000408826852"},{"@type":"NRID","@value":"9000279889923"},{"@type":"NRID","@value":"9000398156145"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/ieda"}],"foaf:name":[{"@value":"Akimasa Ieda"}]}],"publication":{"publicationIdentifier":[{"@type":"EISSN","@value":"14320576"}],"prism:publicationName":[{"@value":"Annales Geophysicae"}],"dc:publisher":[{"@value":"Copernicus GmbH"}],"prism:publicationDate":"2018-10-19","prism:volume":"36","prism:number":"5","prism:startingPage":"1419","prism:endingPage":"1438"},"reviewed":"false","dc:rights":["https://creativecommons.org/licenses/by/4.0/"],"url":[{"@id":"https://angeo.copernicus.org/articles/36/1419/2018/angeo-36-1419-2018.pdf"}],"createdAt":"2018-10-19","modifiedAt":"2020-06-23","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=QC801-809","dc:title":"QC801-809"},{"@id":"https://cir.nii.ac.jp/all?q=Science","dc:title":"Science"},{"@id":"https://cir.nii.ac.jp/all?q=Physics","dc:title":"Physics"},{"@id":"https://cir.nii.ac.jp/all?q=QC1-999","dc:title":"QC1-999"},{"@id":"https://cir.nii.ac.jp/all?q=Q","dc:title":"Q"},{"@id":"https://cir.nii.ac.jp/all?q=Geophysics.%20Cosmic%20physics","dc:title":"Geophysics. Cosmic physics"}],"project":[{"@id":"https://cir.nii.ac.jp/crid/1040282256888067328","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"16K05568"},{"@type":"JGN","@value":"JP16K05568"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16K05568/"}],"notation":[{"@language":"ja","@value":"編隊衛星を用いたオーロラ電流系の解明"},{"@language":"en","@value":"Study of auroral current system using multi-satellite observations"}]}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050576282633237632","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Magnetic Field and Energetic Particle Flux Oscillations and High-Frequency Waves Deep in the Inner Magnetosphere During Substorm Dipolarization: ERG Observations"},{"@value":"Magnetic Field and Energetic Particle Flux Oscillations and High‐Frequency Waves Deep in the Inner Magnetosphere During Substorm Dipolarization: ERG 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