Results 1 to 10 of about 1,145 (204)

Amplitude Dependence of Nonlinear Precipitation Blocking of Relativistic Electrons by Large Amplitude EMIC Waves [PDF]

Geophysical Research Letters, 2022
Recent work has shown that ElectroMagnetic Ion Cyclotron (EMIC) waves tend to occur in four distinct regions, each having their own characteristics and morphology.
Jacob Bortnik, Jay M. Albert, Anton Artemyev, Wen Li, Chae‐Woo Jun, Veronika S. Grach, Andrei G. Demekhov   +6 more
doaj   +3 more sources

Observational Properties of Harmonic EMIC Waves: Statistical Study

Geophysical Research Letters
Electromagnetic ion cyclotron (EMIC) waves are discrete electromagnetic emissions separated by multiple ion gyrofrequencies. Harmonic EMIC waves are defined as waves with a strong electric or magnetic field (or both) at the harmonics of the fundamental ...
Shujie Gu, Xu Liu, Lunjin Chen, M. E. Usanova, Wenyao Gu, Zhiyang Xia   +5 more
doaj   +5 more sources

Propagation of EMIC Waves From Shabansky Orbits in the Dayside Magnetosphere

Geophysical Research Letters
We explore the characteristics of EMIC waves generated in a non‐dipole, compressed magnetic field at the minimum of the magnetic field. We conducted 2D full‐wave simulations using the Petra‐M code, focusing on a compressed magnetic field in the outer ...
Eun‐Hwa Kim, Syun'ichi Shiraiwa, Jay R. Johnson, Nicola Bertelli, Sarah K. Vines, Khan‐Hyuk Kim, Mark Engebretson, Hyomin Kim, Carson O'ffill   +8 more
doaj   +3 more sources

(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
openaire   +4 more sources

Identification of ring current proton precipitation driven by scattering of electromagnetic ion cyclotron waves [PDF]

Fundamental Research, 2023
Among the most intense emissions in the Earth's magnetosphere, electromagnetic ion cyclotron (EMIC) waves are regarded as a critical candidate contributing to the precipitation losses of ring current protons, which however lacks direct multi-point ...
Binbin Ni, Yang Zhang, Xudong Gu
doaj   +2 more sources

Observation of Non‐Resonance Interactions Between Cold Protons and EMIC Waves of Different Polarizations in the Inner Magnetosphere

Geophysical Research Letters, 2023
Using the high‐quality measurements of plasma by the Magnetospheric Multiscale (MMS) spacecraft, we investigate the wave‐particle interaction between cold protons and Electromagnetic ion cyclotron (EMIC) waves of different polarizations in the inner ...
Xinmin Li, Rongsheng Wang, Xinliang Gao, Quanming Lu, Huayue Chen, Jiuqi Ma   +5 more
doaj   +2 more sources

Generation and Characteristics of Unusual High Frequency EMIC Waves [PDF]

Geophysical Research Letters, 2019
AbstractWe report unusual Electromagnetic Ion Cyclotron (EMIC) waves with a very narrow frequency bandwidth, closely following and approaching the proton gyrofrequency. One interesting case analysis shows that magnetosonic waves, anisotropic suprathermal proton distributions, and high frequency EMIC waves are closely related.
S. Teng, W. Li, X. Tao, Q. Ma, Y. Wu, L. Capannolo, X.‐C. Shen, L. Gan   +7 more
openaire   +2 more sources

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
doaj   +2 more sources

Rapid Loss of Relativistic Electrons by EMIC Waves in the Outer Radiation Belt Observed by Arase, Van Allen Probes, and the PWING Ground Stations [PDF]

Geophysical Research Letters, 2018
There has been increasing evidence for pitch angle scattering of relativistic electrons by electromagnetic ion cyclotron (EMIC) waves. Theoretical studies have predicted that the loss time scale of MeV electrons by EMIC waves can be very fast, suggesting
S. Kurita, Y. Miyoshi, K. Shiokawa, N. Higashio, T. Mitani, T. Takashima, A. Matsuoka, I. Shinohara, C. A. Kletzing, J. B. Blake, S. G. Claudepierre, M. Connors, S. Oyama, T. Nagatsuma, K. Sakaguchi, D. Baishev, Y. Otsuka   +16 more
doaj   +3 more sources

A statistical study of EMIC waves observed by Cluster: 1. Wave properties [PDF]

Journal of Geophysical Research: Space Physics, 2015
AbstractElectromagnetic ion cyclotron (EMIC) waves are an important mechanism for particle energization and losses inside the magnetosphere. In order to better understand the effects of these waves on particle dynamics, detailed information about the occurrence rate, wave power, ellipticity, normal angle, energy propagation angle distributions, and ...
R C Allen, J -C Zhang, L M Kistler
exaly   +3 more sources