NSSC OpenIR  > 空间科学部
The mid-high latitude whistler mode chorus waves observed around substorm onsets
Yang, J. Y.; Cao, J. B.; Yan, C. X.; Li, L. Y.; Ma, Y. D.; 北京8701信箱
Department空间天气学国家重点实验室
Source PublicationScience in China Series E-Technological Sciences
2008
Volume51Issue:10Pages:1648-1658
ISSN1006-9321
Language英语
KeywordChorus Substorm Onset Electron Acceleration Storm-time Chorus Source Region Electron Acceleration Magnetospheric Chorus Energetic Electrons Radiation Belt Vlf Chorus Solar-wind Emissions Frequency
AbstractUsing the data of LFEW/TC-2, we studied the dawn side chorus around substorm onsets during a strong geomagnetic storm in November 2004. During this storm, LFEW/TC-2 observed 14 dawnside chorus events. Nine of them were associated with substorms and occurred within 40 min around the substorm onsets. The frequencies of waves have a very good correlation with the half equatorial electron cyclotron frequencies. Chorus can be excited in the region near magnetic equatorial plane and then propagate to the mid and high latitudes. When the wave frequencies reach the local lower hybrid frequencies, chorus can be reflected due to the lower hybrid resonance. The time delay between the chorus and its echo is about 28 min. Previous observations show that the chorus can propagate at most to the magnetic latitudes of 400. LFEW/TC-2 found for the first time that the chorus in space could propagate to the magnetic latitude of 70 degrees. Since most of the previous chorus observations are made close to the magnetic equatorial plane, our results are important for the studies of excitation and propagation of whistler mode wave, and relevant relativistic electron acceleration in the magnetosphere.
Indexed BySCI
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/1115
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
Yang, J. Y.,Cao, J. B.,Yan, C. X.,et al. The mid-high latitude whistler mode chorus waves observed around substorm onsets[J]. Science in China Series E-Technological Sciences,2008,51(10):1648-1658.
APA Yang, J. Y.,Cao, J. B.,Yan, C. X.,Li, L. Y.,Ma, Y. D.,&北京8701信箱.(2008).The mid-high latitude whistler mode chorus waves observed around substorm onsets.Science in China Series E-Technological Sciences,51(10),1648-1658.
MLA Yang, J. Y.,et al."The mid-high latitude whistler mode chorus waves observed around substorm onsets".Science in China Series E-Technological Sciences 51.10(2008):1648-1658.
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