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2021

Periodic Rising and Falling Tone ECH Waves from Van Allen Probes Observations

AbstractElectron cyclotron harmonic (ECH) waves are known to precipitate plasma sheet electrons into the upper atmosphere and generate diffuse aurorae. In this study, we report quasi-periodic rising (3 events) and falling tone (22 events) ECH waves observed by Van Allen Probes, and evaluate their properties. These rising and falling tone ECH waves prefer to occur during quiet geomagnetic conditions over the dusk to midnight sector in relatively high-density (10–80 cm-3) regions. Their repetition periods increase with incre ...

Shen, Xiao-Chen; Li, Wen; Ma, Qianli;

YEAR: 2021     DOI: https://doi.org/10.1029/2020GL091330

ECH wave; falling tone; rising tone; Magnetosphere; plasma wave; Van Allen Probes



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