{"@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/1361699994550735616.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1029/rg010i004p00935"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2FRG010i004p00935"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/RG010i004p00935"}},{"identifier":{"@type":"NAID","@value":"30034662746"}}],"dc:title":[{"@value":"Geomagnetic indices"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>The purpose of this review is to outline the definition and method of derivation of the indices of geomagnetic activity that are most commonly used at present. The first part of the review presents the methods of derivation of <jats:italic>Kp</jats:italic>, <jats:italic>ap</jats:italic>, <jats:italic>AE</jats:italic>, and <jats:italic>Dst</jats:italic>; the second part involves a discussion of the strengths and weaknesses of each index. It is shown that the distribution of magnetic observatories whose data are used in the production of the indices strongly influences the quantitative reliability of the indices in varying degrees. Furthermore, it is found that, in general, indices are only capable of defining the lower limit of geomagnetic activity at any given time. It is concluded that indices should only be used in statistical studies of solar‐terrestrial interactions; their use in the study of individual events is generally not advisable.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1381699994550735616","@type":"Researcher","foaf:name":[{"@value":"Gordon Rostoker"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"87551209"},{"@type":"EISSN","@value":"19449208"}],"prism:publicationName":[{"@value":"Reviews of Geophysics"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"1972-11","prism:volume":"10","prism:number":"4","prism:startingPage":"935","prism:endingPage":"950"},"reviewed":"false","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2FRG010i004p00935"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/RG010i004p00935"}],"createdAt":"2008-02-06","modifiedAt":"2023-09-22","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360004234439044608","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Numerical simulation of ionospheric convection with a global MHD simulation"}]},{"@id":"https://cir.nii.ac.jp/crid/1360017282215822720","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Correlations between Earthquake Properties and Characteristics of Possible ULF Geomagnetic Precursor over Multiple Earthquakes"}]},{"@id":"https://cir.nii.ac.jp/crid/1360285707221922176","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Assessment of the auroral electrojet index performance under various geomagnetic conditions"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567180786640640","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Geomagnetic Indices"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282681485547136","@type":"Article","relationType":["isCitedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Energetic (>0.2 MeV) Electron Bursts in the Deep Geomagnetic Tail Observed by ISEE 3: Association with Substorms and Magnetotail Structures."},{"@language":"ja-Kana","@value":"Energetic 0.2MeV Electron Bursts in the"}]},{"@id":"https://cir.nii.ac.jp/crid/2050307417119869824","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"A possible case of sporadic aurora observed at Rio de Janeiro"}]},{"@id":"https://cir.nii.ac.jp/crid/2050870366939654528","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Automatic selection of Dst storms and their seasonal variations in two versions of Dst in 50 years"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1029/rg010i004p00935"},{"@type":"CIA","@value":"30034662746"},{"@type":"CROSSREF","@value":"10.1088/1742-6596/1035/1/012007_references_DOI_UReyBAwQkio60UuRJuDY3hGxmPy"},{"@type":"CROSSREF","@value":"10.1016/j.jastp.2012.09.017_references_DOI_UReyBAwQkio60UuRJuDY3hGxmPy"},{"@type":"CROSSREF","@value":"10.3390/universe7010020_references_DOI_UReyBAwQkio60UuRJuDY3hGxmPy"},{"@type":"CROSSREF","@value":"10.1007/978-90-481-9858-0_8_references_DOI_UReyBAwQkio60UuRJuDY3hGxmPy"},{"@type":"CROSSREF","@value":"10.1186/s40623-017-0642-2_references_DOI_UReyBAwQkio60UuRJuDY3hGxmPy"},{"@type":"CROSSREF","@value":"10.1186/s40623-020-01208-z_references_DOI_UReyBAwQkio60UuRJuDY3hGxmPy"}]}