Results 221 to 230 of about 18,045 (247)

Analysis of Conjugate Satellite and Ground EMIC Wave Observations

2021 USNC-URSI Radio Science Meeting (USCN-URSI RSM), 2021
Electromagnetic ion cyclotron (EMIC) waves are transverse electromagnetic waves typically generated in the equatorial magnetosphere by anisotropic proton distributions. These waves can resonantly interact with multiple particle populations in the inner magnetosphere believed to be an important loss mechanism for both ring current ions and radiation ...
M. E. Usanova, L. W. Blum
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Geomagnetic storms and EMIC waves: Van Allen Probe observations

Journal of Geophysical Research: Space Physics, 2016
AbstractUtilizing the data from magnetometer instrument of Electric and Magnetic Field Instrument Suite and Integrated Science (EMFISIS) suite on board Van Allen Probe A, the occurrences of electromagnetic ion cyclotron (EMIC) waves during geomagnetic storms and nonstorm periods are investigated.
Dedong Wang, Zhigang Yuan, Xiongdong Yu, Shiyong Huang, Xiaohua Deng, Meng Zhou, Haimeng Li   +6 more
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Characteristics of Subpacket Structures in Ground EMIC Wave Observations

Journal of Geophysical Research: Space Physics, 2018
AbstractRecent studies using satellite observations have reported that subpacket structures play an important role in determining the characteristics of electromagnetic ion cyclotron (EMIC) rising/falling tone emissions. The purpose of the present study is to investigate the subpacket structure characteristics in the ground observations of the EMIC ...
Bharati Kakad, Yoshiharu Omura, Amar Kakad, Aditi Upadhyay, Ashwini K. Sinha   +4 more
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Ion Injection Triggered EMIC Waves in the Earth's Magnetosphere

Journal of Geophysical Research: Space Physics, 2018
AbstractWe present Van Allen Probe observations of electromagnetic ion cyclotron (EMIC) waves triggered solely due to individual substorm‐injected ions in the absence of storms or compressions of the magnetosphere during 9 August 2015. The time at which the injected ions are observed directly corresponds to the onset of EMIC waves at the location of ...
B. Remya, D. G. Sibeck, A. J. Halford, K. R. Murphy, G. D. Reeves, H. J. Singer, J. R. Wygant, G. Farinas Perez, S. A. Thaller   +8 more
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A statistical study of EMIC waves observed by Cluster: 1. Wave properties

2014 XXXIth URSI General Assembly and Scientific Symposium (URSI GASS), 2014
Electromagnetic 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 ellipticity, normal angle, energy propagation angle distributions, and local plasma parameters are required ...
R. C. Allen, J.-C. Zhang, L. M. Kistler, H. E. Spence, R.-L. Lin, B. Klecker, M. W. Dunlop, M. André   +7 more
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Spatial Distribution and Wave Property of Dual‐Frequency EMIC Waves: Swarm Observations

Journal of Geophysical Research: Space Physics
Abstract The spatial distributions of single‐frequency and dual‐frequency Electromagnetic ion cyclotron (EMIC) waves in the subauroral ionosphere are investigated under varying geomagnetic activities, using high‐resolution magnetic field data from dual Swarm satellites spanning from 2015 to 2017.
C. Z. Wang, H. Wang, K. D. Zhang, Y. F. Zhong, H. Xia, Y. Sun, Q. H. Cheng, Z. Y. Leng   +7 more
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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
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Quasi‐Periodic EMIC Waves and Pulsating Ionospheric Perturbations Related to ULF Waves

Journal of Geophysical Research: Space Physics
Abstract Pulsating proton auroras are often attributed to periodic proton precipitation. However, how the proton precipitation is periodically generated in the magnetosphere remains an open issue. Utilizing multi‐point space‐borne and ground‐based observations, this study proposed a potential mechanism responsible for pulsating proton
Longxing Ma, Yiqun Yu, Xin Tong, Linhui Tang, Wenlong Liu, Jinbin Cao, Jun Wu, Jian Wu   +7 more
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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
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Extremely High Frequency (~30 Hz) EMIC Wave Observed

2022
Jayasri Joseph, Allison Jaynes, Maria Usanova   +2 more
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