{"@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/1361137044779878784.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1002/2015ja021968"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F2015JA021968"}},{"identifier":{"@type":"URI","@value":"https://onlinelibrary.wiley.com/doi/pdf/10.1002/2015JA021968"}},{"identifier":{"@type":"URI","@value":"https://onlinelibrary.wiley.com/doi/full-xml/10.1002/2015JA021968"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2015JA021968"}}],"dc:title":[{"@value":"EMIC waves observed at geosynchronous orbit under quiet geomagnetic conditions (\n                    <i>Kp</i>\n                     ≤ 1)"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Abstract</jats:title>\n                  <jats:p>\n                    We statistically study the local time distribution of the helium band electromagnetic ion cyclotron (EMIC) waves observed at geosynchronous orbit when geomagnetic activity was low (\n                    <jats:italic>K</jats:italic>\n                    <jats:italic>p</jats:italic>\n                    ≤ 1). In order to identify the geosynchronous EMIC waves, we use high time resolution magnetic field data acquired from GOES 10, 11, and 12 over a 2 year period from 2007 and 2008 and examine the local time distribution of EMIC wave events. Unlike previous studies, which reported high EMIC wave occurrence in the postnoon sector with a peak around 1500–1600 magnetic local time (MLT) during magnetically disturbed times (i.e., storm and/or substorm), we observed that quiet time EMIC waves mostly occur in a region from morning (∼0600 MLT) to afternoon (∼1600 MLT) with a peak around 1100–1200 MLT. To investigate whether the quiet time EMIC wave occurrence has a causal relationship with magnetospheric convection enhancement or solar wind dynamic pressure variations, we performed a superposed epoch analysis of solar wind parameters (solar wind speed, density, dynamic pressure, and interplanetary magnetic field\n                    <jats:italic>B</jats:italic>\n                    <jats:sub>\n                      <jats:italic>z</jats:italic>\n                    </jats:sub>\n                    ) and geomagnetic indices (\n                    <jats:italic>A</jats:italic>\n                    <jats:italic>E</jats:italic>\n                    and\n                    <jats:italic>S</jats:italic>\n                    <jats:italic>Y</jats:italic>\n                    <jats:italic>M</jats:italic>\n                    ‐\n                    <jats:italic>H</jats:italic>\n                    ). From the superposed epoch analysis we found that solar wind dynamic pressure variation is a more important parameter than\n                    <jats:italic>A</jats:italic>\n                    <jats:italic>E</jats:italic>\n                    and\n                    <jats:italic>S</jats:italic>\n                    <jats:italic>Y</jats:italic>\n                    <jats:italic>M</jats:italic>\n                    ‐\n                    <jats:italic>H</jats:italic>\n                    for quiet time EMIC wave occurrence.\n                  </jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1381137044779878784","@type":"Researcher","foaf:name":[{"@value":"J.‐S. Park"}],"jpcoar:affiliationName":[{"@value":"Institute of Space Science National Central University  Jhongli Taiwan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381137044779878788","@type":"Researcher","foaf:name":[{"@value":"K.‐H. Kim"}],"jpcoar:affiliationName":[{"@value":"School of Space Research Kyung Hee University  Yongin South Korea"},{"@value":"Institute for Space‐Earth Environmental Research Nagoya University  Nagoya Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381137044779878791","@type":"Researcher","foaf:name":[{"@value":"K. Shiokawa"}],"jpcoar:affiliationName":[{"@value":"Institute for Space‐Earth Environmental Research Nagoya University  Nagoya Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381137044779878786","@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/1381137044779878789","@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/1381137044779878787","@type":"Researcher","foaf:name":[{"@value":"H.‐J. Kwon"}],"jpcoar:affiliationName":[{"@value":"Korea Polar Research Institute  Incheon South Korea"}]},{"@id":"https://cir.nii.ac.jp/crid/1381137044779878790","@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/1381137044779878785","@type":"Researcher","foaf:name":[{"@value":"G. Jee"}],"jpcoar:affiliationName":[{"@value":"Korea Polar Research Institute  Incheon 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":"2016-02","prism:volume":"121","prism:number":"2","prism:startingPage":"1377","prism:endingPage":"1390"},"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%2F2015JA021968"},{"@id":"https://onlinelibrary.wiley.com/doi/pdf/10.1002/2015JA021968"},{"@id":"https://onlinelibrary.wiley.com/doi/full-xml/10.1002/2015JA021968"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2015JA021968"}],"createdAt":"2016-02-01","modifiedAt":"2025-12-03","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050287685056607872","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Occurrence characteristics of electromagnetic ion cyclotron waves at sub-auroral Antarctic station Maitri during solar cycle 24"}]},{"@id":"https://cir.nii.ac.jp/crid/1050845763744001024","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Purple Auroral Rays and Global Pc1 Pulsations Observed at the CIR-Associated Solar Wind Density Enhancement on 21 March 2017"},{"@value":"Purple Auroral Rays and Global Pc1 Pulsations Observed at the CIR‐Associated Solar Wind Density Enhancement on 21 March 2017"}]},{"@id":"https://cir.nii.ac.jp/crid/1360002214350577408","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Heliospheric plasma sheet (HPS) impingement onto the magnetosphere as a cause of relativistic electron dropouts (REDs) via coherent EMIC wave scattering with possible consequences for climate change mechanisms"}]},{"@id":"https://cir.nii.ac.jp/crid/1360013168735964288","@type":"Article","resourceType":"学術雑誌論文(journal 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