{"@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/1361699994521124992.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1029/ja086ia13p11265"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2FJA086iA13p11265"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/JA086iA13p11265"}}],"dc:title":[{"@value":"Substorm signatures at synchronous altitude"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>The signatures of magnetospheric substorms near 6.6 R<jats:sub>E</jats:sub> are statistically examined by using data obtained on board ATS 6 by magnetic field and energetic particle measurements. It was confirmed that the configuration change toward a taillike field in the dusk‐to‐midnight sector typically begins about one hour before the onset of the expansion phase of a substorm. Configuration changes before the onsets of moderate substorms are characterized by a directional change of magnetic field at magnetic latitude of ∼10°, rather than a change in the field magnitude. During storm periods it was found that the magnetic field orientation occasionally becomes almost parallel to the magnetic equator before expansion phase onsets. In such cases, the field magnitude usually increases above background levels. These facts strongly suggest that a taillilke configuration is caused by an intensification and earthward motion of the cross‐tail current system, often close to 6.6 R<jats:sub>E</jats:sub>, than the development of diamagnetic ring current. The degree of taillike field distortion is statistically correlated with a subsequent field recovery during the expansion phase. Namely, a large field recovery at ATS 6 and associated large positive bays on the ground tend to follow a pronounced deviation from a quiet field level at ATS 6. The examination of ground magnetograms indicates that the development of S<jats:sub>q</jats:sub><jats:sup>p</jats:sup> or convection bay type current system is associated with the taillike field configuration. These results are discussed in term of a phenomenological model of magnetospheric substorms including the precursory or growth phase.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1381699994521124992","@type":"Researcher","foaf:name":[{"@value":"Susumu Kokubun"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699994521124993","@type":"Researcher","foaf:name":[{"@value":"Robert L. McPherron"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"01480227"}],"prism:publicationName":[{"@value":"Journal of Geophysical Research: Space Physics"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"1981-12","prism:volume":"86","prism:number":"A13","prism:startingPage":"11265","prism:endingPage":"11277"},"reviewed":"false","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2FJA086iA13p11265"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/JA086iA13p11265"}],"createdAt":"2008-02-06","modifiedAt":"2023-09-22","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050013244132544512","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Field- Aligned Low-Energy O+ Flux Enhancements in the Inner Magnetosphere Observed by Arase"},{"@value":"Field‐Aligned Low‐Energy O<sup>+</sup> Flux Enhancements in the Inner Magnetosphere Observed by Arase"}]},{"@id":"https://cir.nii.ac.jp/crid/1360283691685703168","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Coupling of dipolarization front flow bursts to substorm expansion phase phenomena within the magnetosphere and ionosphere"}]},{"@id":"https://cir.nii.ac.jp/crid/1360285708268343168","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Magnetic Field Dipolarization and Its Associated Ion Flux Variations in the Dawnside Deep Inner Magnetosphere: Arase Observations"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567183239195008","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Substorm convection and current system deduced from the global simulation"}]},{"@id":"https://cir.nii.ac.jp/crid/1360576118797095936","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Ionospheric Electron Density and Conductance Changes in the Auroral Zone During Substorms"}]},{"@id":"https://cir.nii.ac.jp/crid/1360853567562934016","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Proton and Electron Injection Path at Geosynchronous Altitude"}]},{"@id":"https://cir.nii.ac.jp/crid/1360857593757132800","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Comparative Study of Electric Currents and Energetic Particle Fluxes in a Solar Flare and Earth Magnetospheric Substorm"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206508814336","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Prediction of a geosynchronous electron environment with in situ magnetic field measurements"}]},{"@id":"https://cir.nii.ac.jp/crid/2050307417119867392","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Penetration electric fields observed at middle and low latitudes during the 22 June 2015 geomagnetic storm"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1029/ja086ia13p11265"},{"@type":"CROSSREF","@value":"10.1029/2021ja029168_references_DOI_BXEszBWtsSPccJ8qIgjyajGqe79"},{"@type":"CROSSREF","@value":"10.1029/2011ja017265_references_DOI_BXEszBWtsSPccJ8qIgjyajGqe79"},{"@type":"CROSSREF","@value":"10.1029/2018gl078825_references_DOI_BXEszBWtsSPccJ8qIgjyajGqe79"},{"@type":"CROSSREF","@value":"10.1186/bf03352225_references_DOI_BXEszBWtsSPccJ8qIgjyajGqe79"},{"@type":"CROSSREF","@value":"10.1029/2009ja014676_references_DOI_BXEszBWtsSPccJ8qIgjyajGqe79"},{"@type":"CROSSREF","@value":"10.1029/2021ja029572_references_DOI_BXEszBWtsSPccJ8qIgjyajGqe79"},{"@type":"CROSSREF","@value":"10.1029/2018ja026281_references_DOI_BXEszBWtsSPccJ8qIgjyajGqe79"},{"@type":"CROSSREF","@value":"10.3847/1538-4357/ac2dfc_references_DOI_BXEszBWtsSPccJ8qIgjyajGqe79"},{"@type":"CROSSREF","@value":"10.1186/s40623-020-01196-0_references_DOI_BXEszBWtsSPccJ8qIgjyajGqe79"}]}