Results 211 to 220 of about 2,661,724 (245)

Relativistic Electron Flux Decay and Recovery: Relative Roles of EMIC Waves, Chorus Waves, and Electron Injections

Journal of Geophysical Research: Space Physics
We investigate the dynamics of relativistic electrons in the Earth's outer radiation belt by analyzing the interplay of several key physical processes: electron losses due to pitch angle scattering from electromagnetic ion cyclotron (EMIC) waves and ...
Zijin Zhang, A. Artemyev, D. Mourenas, V. Angelopoulos, Xiaojia Zhang, S. Kasahara, Y. Miyoshi, A. Matsuoka, Y. Kasahara, T. Mitani, S. Yokota, T. Hori, K. Keika, T. Takashima, M. Teramoto, S. Matsuda, I. Shinohara, AL Zhang   +17 more
semanticscholar   +1 more source

Influence of Initial Proton Energy on the Nonlinear Interactions Between Ring Current Protons and He+ Band EMIC Waves

Journal of Geophysical Research: Space Physics
The energy of ring current protons is believed to influence the pitch angle scattering due to electromagnetic ion cyclotron (EMIC) waves and is typically analyzed using quasi‐linear theory.
Su Zhou, Yongzhi Cai
semanticscholar   +1 more source

Linear Theory Analysis and One‐Dimensional Hybrid Simulations of High‐Frequency EMIC Waves in a Dipole Magnetic Field

Journal of Geophysical Research: Space Physics
Narrowband (Δf ≲ 0.1fcp), high‐frequency (0.9fcp ≲ f < fcp) electromagnetic ion cyclotron (EMIC) waves, or HFEMIC waves for short, are a relatively new type of EMIC waves, where fcp is the proton cyclotron frequency.
K. Min
semanticscholar   +1 more source

High Latitude EMIC Waves in the Earth's Inner Magnetosphere: A Global View of the Wave‐Induced Source for Heavy Ion Conics and Warm Plasma Cloak

Journal of Geophysical Research: Space Physics
This study is a follow‐up to the Gamayunov et al. (2024, https://doi.org/10.1029/2023ja032399) paper, where they show that dissipation of the He+ ${\mathrm{H}\mathrm{e}}^{+}$ ‐band and H+ ${\mathrm{H}}^{+}$ ‐band electromagnetic ion cyclotron (EMIC) wave
K. Gamayunov, Hyomin Kim, Youra Shin
semanticscholar   +1 more source

Ionospheric responses modulated by quasi-periodic EMIC waves associated with ULF waves

Energetic protons can be efficiently scattered by electromagnetic ion cyclotron (EMIC) waves into the upper atmosphere. This process represents a crucial mechanism for the exchange of energy and particles between the magnetosphere and ionosphere. In this study, quasi-periodic EMIC waves induced by Pc4 ULF waves were observed by the Van Allen Probes ...
Longxing Ma, Yiqun Yu, Xin Tong, Linhui Tang, Wenlong Liu, Jinbin Cao, Jun Wu, Jian Wu   +7 more
openaire   +1 more source

Wave Vector of H+ Band EMIC Waves and Corresponding Electron Resonance Energy Determinations by 4 MMS Satellites

United States National Committee of URSI National Radio Science Meeting
Electromagnetic ion cyclotron (EMIC) waves are electromagnetic emissions with frequencies below the ion cyclotron frequencies. These waves are an important agent for interacting with ring current and relativistic electrons.
Xu Liu, Lunjin Chen
semanticscholar   +1 more source

Westward Excursion of Pc1/EMIC Waves and Their Source Protons: Paradoxical Observations From Ground and Space

Journal of Geophysical Research: Space Physics
Pc1 geomagnetic pulsations within the frequency range of 0.2–5 Hz, the ground signatures of electromagnetic ion cyclotron (EMIC) waves, are usually observed to progress westward.
Z. Yin, Xuzhi Zhou, Zejun Hu, C. Yue, Q. Zong, Zhiyang Liu, Jian‐jun Liu, Kazuo Shiokawa, S. Oyama, D. Baishev   +9 more
semanticscholar   +1 more source

Interaction of EMIC Waves With Thermal Plasma and Radiation Belt Particles

2006
Electromagnetic ion cyclotron (EMIC) waves are excited during the enhanced convective injection of plasmasheet ions into the inner magnetosphere. Waves grow rapidly near the magnetic equatorial plane reaching amplitudes up to 10 nT. Such intense waves induce scattering of cyclotron resonant ions at a rate comparable to the strong diffusion limit ...
Thorne, Richard M., Horne, Richard B., Jordanova, Vania K., Bortnik, Jacob, Glauert, Sarah   +4 more
openaire   +2 more sources

Global Distribution of EMIC Waves and Its Association to Subauroral Proton Precipitation During the 27 May 2017 Storm: Modeling and Multipoint Observations

Journal of Geophysical Research: Space Physics
Recent simulation studies using the RAM‐SCB model showed that proton precipitation contributes significantly to the total energy flux deposited into the subauroral ionosphere thereby affecting the magnetosphere‐ionosphere coupling.
P. R. Shreedevi, Yiqun Yu, Y. Miyoshi, Xinbin Tian, Minghui Zhu, V. Jordanova, S. Nakamura, C. Jun, Sandeep Kumar, K. Shiokawa, M. Connors, T. Hori, M. Shoji, I. Shinohara, S. Yokota, S. Kasahara, K. Keika, A. Matsuoka, A. Kadokura, Fuminori Tsuchiya, Atsushi Kumamoto, Y. Kasahara, AL Shreedevi   +22 more
semanticscholar   +1 more source

Observational Properties of Harmonic EMIC Waves in the Earth Magnetosphere

United States National Committee of URSI National Radio Science Meeting
The electromagnetic ion cyclotron (EMIC) waves are electromagnetic emissions with frequency range of Pc1-Pc2 (0.1-5 Hz) geomagnetic pulsations. They have been widely observed in the Earth magnetosphere, solar wind and other planets in the solar system ...
S. Gu, Xu Liu, Lunjin Chen, W. Gu
semanticscholar   +1 more source