{"@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/1362262946029284352.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1002/jgra.50582"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjgra.50582"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/jgra.50582"}}],"dc:title":[{"@value":"Low‐latitude Pi2 pulsations during intervals of quiet geomagnetic conditions (<b><i>K</i><sub><i>p</i></sub>≤1</b>)"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>It has been reported that Pi2 pulsations can be excited under extremely quiet geomagnetic conditions (<jats:italic>K</jats:italic><jats:sub><jats:italic>p</jats:italic></jats:sub>=0). However, there have been few comprehensive reports of Pi2 pulsations in such a near ground state magnetosphere. To understand the characteristics of quiet‐time Pi2 pulsations, we statistically examined Pi2 events observed on the nightside between 1800 and 0600 local time at the low‐latitude Bohyun (BOH, <jats:italic>L</jats:italic> = 1.35) station in South Korea. We chose year 2008 for analysis because geomagnetic activity was unusually low in that year. A total of 982 Pi2 events were identified when <jats:italic>K</jats:italic><jats:sub><jats:italic>p</jats:italic></jats:sub>≤1. About 80% of the Pi2 pulsations had a period between 110 and 300 s, which significantly differs from the conventional Pi2 period from 40 to 150 s. Comparing Pi2 periods and solar wind conditions, we found that Pi2 periods decrease with increasing solar wind speed, consistent with the result of Troitskaya (1967). The observed wave properties are discussed in terms of plasmaspheric resonance, which has been proposed for Pi2 pulsations in the inner magnetosphere. We also found that Pi2 pulsations occur quasi‐periodically with a repetition period of ∼23–38 min. We will discuss what determines such a recurrence time of Pi2 pulsations under quiet geomagnetic conditions.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380579818246564738","@type":"Researcher","foaf:name":[{"@value":"H.‐J. Kwon"}],"jpcoar:affiliationName":[{"@value":"School of Space Research Kyung Hee University  Yongin South Korea"},{"@value":"Korea Space Weather Center RRA  Jeju South Korea"}]},{"@id":"https://cir.nii.ac.jp/crid/1380579818246564740","@type":"Researcher","foaf:name":[{"@value":"K.‐H. Kim"}],"jpcoar:affiliationName":[{"@value":"School of Space Research Kyung Hee University  Yongin South Korea"}]},{"@id":"https://cir.nii.ac.jp/crid/1380579818246564736","@type":"Researcher","foaf:name":[{"@value":"C.‐W. Jun"}],"jpcoar:affiliationName":[{"@value":"Solar‐Terrestrial Environment Laboratory Nagoya University  Nagoya Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262946029284358","@type":"Researcher","foaf:name":[{"@value":"K. Takahashi"}],"jpcoar:affiliationName":[{"@value":"Applied Physics Laboratory Johns Hopkins University  Laurel Maryland USA"}]},{"@id":"https://cir.nii.ac.jp/crid/1380579818246564739","@type":"Researcher","foaf:name":[{"@value":"D.‐H. Lee"}],"jpcoar:affiliationName":[{"@value":"School of Space Research Kyung Hee University  Yongin South Korea"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262946029284361","@type":"Researcher","foaf:name":[{"@value":"E. Lee"}],"jpcoar:affiliationName":[{"@value":"School of Space Research Kyung Hee University  Yongin South Korea"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262946029284355","@type":"Researcher","foaf:name":[{"@value":"H. Jin"}],"jpcoar:affiliationName":[{"@value":"School of Space Research Kyung Hee University  Yongin South Korea"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262946029284359","@type":"Researcher","foaf:name":[{"@value":"J. Seon"}],"jpcoar:affiliationName":[{"@value":"School of Space Research Kyung Hee University  Yongin South Korea"}]},{"@id":"https://cir.nii.ac.jp/crid/1380579818246564737","@type":"Researcher","foaf:name":[{"@value":"Y.‐D. Park"}],"jpcoar:affiliationName":[{"@value":"Solar and Space Weather Research Group Korea Astronomy and Space Science Institute  Daejeon South Korea"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262946029284352","@type":"Researcher","foaf:name":[{"@value":"J. Hwang"}],"jpcoar:affiliationName":[{"@value":"Solar and Space Weather Research Group Korea Astronomy and Space Science Institute  Daejeon South Korea"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"21699380"},{"@type":"EISSN","@value":"21699402"}],"prism:publicationName":[{"@value":"Journal of Geophysical Research: Space Physics"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2013-10","prism:volume":"118","prism:number":"10","prism:startingPage":"6145","prism:endingPage":"6153"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjgra.50582"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/jgra.50582"}],"createdAt":"2013-10-12","modifiedAt":"2023-09-02","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050857757609947648","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Off-Equatorial Pi2 Pulsations Inside and Outside the Plasmapause Observed by the Arase Satellite"},{"@value":"Off‐Equatorial Pi2 Pulsations Inside and Outside the Plasmapause Observed by the Arase Satellite"}]},{"@id":"https://cir.nii.ac.jp/crid/1360580230594858368","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Probabilistic modelling of substorm occurrences with an echo state network"}]},{"@id":"https://cir.nii.ac.jp/crid/2050588891962944384","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Nighttime Pc3 pulsations : MM100 and MAGDAS observations"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1002/jgra.50582"},{"@type":"OPENAIRE","@value":"doi_dedup___::a9ca709b3d7940635688ae379f11567c"},{"@type":"CROSSREF","@value":"10.1186/s40623-017-0647-x_references_DOI_L4o8YRsWU22nhypyWYy3slbnLEA"},{"@type":"CROSSREF","@value":"10.1029/2021ja029677_references_DOI_L4o8YRsWU22nhypyWYy3slbnLEA"},{"@type":"CROSSREF","@value":"10.5194/angeo-41-529-2023_references_DOI_L4o8YRsWU22nhypyWYy3slbnLEA"}]}