Results 21 to 30 of about 782 (172)

Occurrence of EMIC Waves in the Magnetosphere According to Their Distance to the Magnetopause [PDF]

Geophysical Research Letters, 2021
AbstractWave growth of electromagnetic ion cyclotron (EMIC) emissions observed in the outer magnetosphere is mainly controlled by compression events resulting from solar wind dynamic pressure pulses. During such events wave growth is expected to be maximum close to the magnetopause. In previous studies, distribution of EMIC waves was analyzed according
Grison, B., Santolík, O., Lukačevič, J., Usanova, M. E.   +3 more
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On the Observation of Electrostatic Harmonics Associated With EMIC Waves [PDF]

Geophysical Research Letters, 2019
AbstractIn this study, we report two events of electrostatic harmonics associated with electromagnetic ion cyclotron (EMIC) waves recorded by the Van Allen Probes. Based on the wave and plasma measurements, the wave features are investigated and the possible generation mechanism is discussed.
Hui Zhu, Lunjin Chen
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Relativistic Electron Precipitation by EMIC Waves: Importance of Nonlinear Resonant Effects

Geophysical Research Letters, 2022
Relativistic electron losses in Earth's radiation belts are usually attributed to electron resonant scattering by electromagnetic waves. One of the most important wave modes for such scattering is the electromagnetic ion cyclotron (EMIC) mode. Within the
Veronika S. Grach, Anton V. Artemyev, Andrei G. Demekhov, Xiao‐Jia Zhang, Jacob Bortnik, Vassilis Angelopoulos, Rumi Nakamura, Ethan Tsai, Colin Wilkins, Owen W. Roberts   +9 more
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Direct Evidence of the Pitch Angle Scattering of Relativistic Electrons Induced by EMIC Waves

Geophysical Research Letters, 2020
In this study, we analyze an electromagnetic ion cyclotron (EMIC) wave event of rising tone elements recorded by the Van Allen Probes. The pitch angle distributions of relativistic electrons exhibit a direct response to the two elements of EMIC waves: at
Hui Zhu, Lunjin Chen, Seth G. Claudepierre, Liheng Zheng   +3 more
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Effect of Solar Wind Pressure and Substorm Linked Particle Injection on Local Time Distribution of Electromagnetic Ion Cyclotron Waves

Frontiers in Astronomy and Space Sciences, 2022
Several observations of electromagnetic ion cyclotron (EMIC) waves have been reported from the Earth’s magnetosphere. It is an important component of space weather research due to its efficient role in precipitating highly energetic electrons from the ...
Aditi Upadhyay, Bharati Kakad, Amar Kakad, R. Rawat   +3 more
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Electromagnetic ion-cyclotron instability in the presence of a parallel electric field with general loss-cone distribution function - particle aspect analysis [PDF]

Annales Geophysicae, 2006
The effect of parallel electric field on the growth rate, parallel and perpendicular resonant energy and marginal stability of the electromagnetic ion-cyclotron (EMIC) wave with general loss-cone distribution function in a low β homogeneous ...
G. Ahirwar, P. Varma, M. S. Tiwari
doaj   +1 more source

(Un)Explained EMIC Waves: Understanding Quiet Time EMIC Wave Drivers [PDF]

Journal of Geophysical Research: Space Physics
Abstract Electromagnetic ion cyclotron (EMIC) waves are known to be generated through cyclotron resonance with the local ion particle population and grow when there is a large enough temperature anisotropy. In general, these temperature anisotropies necessary for wave growth are found to be associated with either solar wind pressure ...
B. Remya, A. J. Halford, S. J. Noh, P. A. Fernandes, B. Grison, D. Wang, J. Himmelsbach, T. Esman, D. B. Graham, D. G. Sibeck, T. Raita, A. P. Dimri   +11 more
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Multi‐Ion Oscillitons—Origin of Coherent Magnetospheric EMIC Waves

Journal of Geophysical Research: Space Physics, 2022
Abstract The recent spacecraft observations by MMS and Van Allen Probes associated with electromagnetic ion cyclotron (EMIC) waves in the Earth magnetosphere emphasize the important role of multi‐ion plasma composition for generation and characteristics of these emissions.
Sauer, Konrad, Dubinin, Eduard, Dubinin, Eduard; 1 Max‐Planck Institute of Solar System Research Göttingen Germany   +2 more
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Prompt Emergence and Disappearance of EMIC Waves Driven by the Sequentially Enhanced Solar Wind Dynamic Pressure

Geophysical Research Letters, 2021
Van Allen Probes (VAPs) and multiple ground‐based stations simultaneously observed prompt emergences and disappearances of electromagnetic ion cyclotron (EMIC) waves driven by the sequentially enhanced solar wind dynamic pressures in the dayside inner ...
Zuxiang Xue, Zhigang Yuan, Xiongdong Yu
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Wavenumber Analysis of EMIC Waves

Geophysical Research Letters, 2019
AbstractIt has been highly controversial as to whether and how efficient electromagnetic ion cyclotron (EMIC) waves can scatter sub–megaelectronvolt (MeV) to multi–megaelectron volt electrons into the atmospheric loss cone. The capability of EMIC wave scattering essentially depends on the wavenumber spectra, instead of readily available frequency ...
Lunjin Chen, Hui Zhu, Xiaojia Zhang
openaire   +1 more source