Results 31 to 40 of about 1,145 (204)

Full-wave modeling of EMIC wave packets: ducted propagation and reflected waves

Frontiers in Astronomy and Space Sciences, 2023
Electromagnetic ion cyclotron (EMIC) waves can scatter radiation belt electrons with energies of a few hundred keV and higher. To accurately predict this scattering and the resulting precipitation of these relativistic electrons on short time scales, we need detailed knowledge of the wave field’s spatio-temporal evolution, which cannot be obtained from
Miroslav Hanzelka, Miroslav Hanzelka, Wen Li, Qianli Ma, Qianli Ma, Murong Qin, Xiao-Chen Shen, Luisa Capannolo, Longzhi Gan   +8 more
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Dataset for a manuscript "Unusual High Frequency EMIC Waves: Detailed Analysis of EMIC Wave Excitation and Energy Coupling Between EMIC and Magnetosonic Waves"

, 2021
Dataset for a manuscript "Unusual High Frequency EMIC Waves: Detailed Analysis of EMIC Wave Excitation and Energy Coupling Between EMIC and Magnetosonic ...
Min, Kyungguk
core   +1 more source

Effects of polarization-reversed electromagnetic ion cyclotron waves on the ring current dynamics

Earth and Planetary Physics, 2022
Electromagnetic ion cyclotron (EMIC) waves are widely believed to play an important role in influencing the radiation belt and ring current dynamics.
MingHui Zhu, YiQun Yu, Xing Cao, BinBin Ni, XingBin Tian, JinBin Cao, Vania K. Jordanova   +6 more
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Probing the relationship between electromagnetic ion cyclotron waves and plasmaspheric plumes near geosynchronous orbit [PDF]

, 2010
Plasmaspheric plumes created during disturbed geomagnetic conditions have been suggested as a major cause of increased occurrences of electromagnetic ion cyclotron (EMIC) waves at these times.
R. B. Horne, M. J. Engebretson, M. R. Lessard, Denton, M.H., Horne, R.B., Posch, J.L., Murphy, M.T., Engebretson, M.J., M. T. Murphy, J. L. Posch, Lessard, M.R., M. H. Denton   +11 more
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Occurrence characteristics of electromagnetic ion cyclotron waves at sub-auroral Antarctic station Maitri during solar cycle 24

Earth, Planets and Space, 2020
We present a statistical study of electromagnetic ion cyclotron (EMIC) waves observed at Antarctic station (geographic $$70.7{^\circ }\,\hbox {S}$$ 70.7 ∘ S , $$11.8{^\circ }\,\hbox {E}$$ 11.8 ∘ E , $$L=5$$ L = 5 ) on quiet and disturbed days during 2011–
Aditi Upadhyay, Bharati Kakad, Amar Kakad, Yoshiharu Omura, Ashwini Kumar Sinha   +4 more
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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
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Physical mechanisms of compressional EMIC wave growth [PDF]

Journal of Geophysical Research: Space Physics, 2010
On 29 June 2007, electromagnetic ion cyclotron (EMIC) waves were observed on the ground by the Canadian Array for Realtime Investigations of Magnetic Activity (CARISMA) network of magnetometers between L = 4 and L = 6 in response to a significant magnetospheric compression.
J. P. McCollough, S. R. Elkington, M. E. Usanova, I. R. Mann, D. N. Baker, Z. C. Kale   +5 more
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Beam effect on electromagnetic ion-cyclotron waves with general loss – cone distribution function in an anisotropic plasma-particle aspect analysis [PDF]

Annales Geophysicae, 2007
The effect of upgoing ion beam and temperature anisotropy on the dispersion relation, growth rate, parallel and perpendicular resonant energies, and marginal instability of the electromagnetic ion cyclotron (EMIC) waves, with general loss-cone ...
G. Ahirwar, P. Varma, M. S. Tiwari
doaj   +1 more source

Ionospheric Modulation by EMIC Wave‐Driven Proton Precipitation: Observations and Simulations

Journal of Geophysical Research: Space Physics, 2023
AbstractProtons of tens of keV can be resonantly scattered by electromagnetic ion cyclotron (EMIC) waves excited in the magnetosphere, resulting in proton precipitation down to the upper atmosphere. In this study, we report for the first time the ionospheric height‐dependent ionization in response to EMIC‐associated isolated proton aurora (IPA) using ...
Xingbin Tian, Yiqun Yu, Fan Gong, Longxing Ma, Jinbin Cao, Stanley C. Solomon, P. R. Shreedevi, Kazuo Shiokawa, Yuichi Otsuka, Shin‐ichiro Oyama, Yoshizumi Miyoshi   +10 more
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Simultaneous occurrence of four magnetospheric wave modes and the resultant combined scattering effect on radiation belt electrons

Earth and Planetary Physics, 2022
We report a representative concurrent event of four wave modes at L ≈ 5.0, including electrostatic electron cyclotron harmonic (ECH) waves, exohiss, magnetosonic (MS) waves, and electromagnetic ion cyclotron (EMIC) waves, based on the observations from ...
YiWen Zhao, Zheng Xiang, XuDong Gu, BinBin Ni, Xin Ma, YueQun Lou, LuHuai Jiao, RuoXian Zhou, DeYu Guo, YangXiZi Liu, JunHu Dong   +10 more
doaj   +1 more source