Results 1 to 10 of about 18,045 (247)

Excitation of EMIC waves detected by the Van Allen Probes on 28 April 2013 [PDF]

, 2014
We report the wave observations, associated plasma measurements, and linear theory testing of electromagnetic ion cyclotron (EMIC) wave events observed by the Van Allen Probes on 28 April 2013.
Allen, R. C., Funsten, H. O., Jordanova, V K, Kistler, Lynn M., Kletzing, C A., Kurth, W. S., Larsen, Bradford, Mouikis, Christoforos, Reeves, Geoffrey, Saiken, A A, Skoug, R. M., Smith, Charles W., Spence, Harlan E., Torbert, Roy B., Zhang, J. C.   +14 more
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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
openaire   +2 more sources

High-resolution in situ observations of electron precipitation-causing EMIC waves [PDF]

, 2015
Electromagnetic ion cyclotron (EMIC) waves are thought to be important drivers of energetic electron losses from the outer radiation belt through precipitation into the atmosphere. While the theoretical possibility of pitch angle scattering-driven losses
Aaron T. Hendry, Baker, Blake, Blum, Carson, Chen, Clilverd, Clilverd, Cornwall, Craig A. Kletzing, Craig J. Rodger, Drozdov, Engebretson, Evans, Geoffrey D. Reeves, Gurnett, Hendry, James B. Brundell, Kennel, Kletzing, Kurth, Mark A. Clilverd, Meredith, Ni, Omura, Paulson, Rodger, Rodger, Rodger, Rodger, Roederer, Saikin, Sandanger, Shprits, Sibeck, Summers, Thorne, Thorne, Ukhorskiy, Usanova, Xiao, Yando   +41 more
core   +2 more sources

Energy Exchange Between Electromagnetic Ion Cyclotron (EMIC) Waves and Thermal Plasma: From Theory to Observations

Frontiers in Astronomy and Space Sciences, 2021
The cold plasmaspheric plasma, the ring current and the radiation belts constitute three important populations of the inner magnetosphere. The overlap region between these populations gives rise to wave-particle interactions between different plasma ...
M. E. Usanova
doaj   +1 more source

Scattering of Ultra-relativistic Electrons in the Van Allen Radiation Belts Accounting for Hot Plasma Effects. [PDF]

, 2017
Electron flux in the Earth's outer radiation belt is highly variable due to a delicate balance between competing acceleration and loss processes. It has been long recognized that Electromagnetic Ion Cyclotron (EMIC) waves may play a crucial role in the ...
Cao, Xing, Ni, Binbin, Shprits, Yuri Y, Zhelavskaya, Irina S   +3 more
core   +2 more sources

Inferring magnetospheric heavy ion density using EMIC waves [PDF]

Journal of Geophysical Research: Space Physics, 2015
AbstractWe present a method to infer heavy ion concentration ratios from electromagnetic ion cyclotron (EMIC) wave observations that result from ion‐ion hybrid (IIH) resonance. A key feature of the IIH resonance is the concentration of wave energy in a field‐aligned resonant mode that exhibits linear polarization.
Eun‐Hwa Kim, Jay R. Johnson, Hyomin Kim, Dong‐Hun Lee   +3 more
openaire   +1 more source

Formation of the mass density peak at the magnetospheric equator triggered by EMIC waves

Earth and Planetary Physics, 2021
We report a simultaneous observation of two band electromagnetic ion cyclotron (EMIC) waves and toroidal Alfvén waves by the Van Allen Probe mission.
ZuXiang Xue, ZhiGang Yuan, XiongDong Yu, ShiYong Huang, Zheng Qiao   +4 more
doaj   +1 more source

Competing source and loss mechanisms due to wave-particle interactions in Earth’s outer radiation belt during the 30 September to 3 October 2012 geomagnetic storm [PDF]

, 2014
Drastic variations of Earth’s outer radiation belt electrons ultimately result from various competing source, loss, and transport processes, to which wave-particle interactions are critically important.
Angelopoulos, V., Baker, D. N., Blake, J. B., Bortnik, J., Claudepierre, S., Henderson, M. G., Huang, Chia-Lin L., Kletzing, C A., Kurth, W. S., Li, W., Ma, Q., Mann, I. R., Morley, S. K., Ni, B., Reeves, Geoffrey, Rodriguez, J. V., Spence, Harlan E., Thorne, R. M., Turner, D. L., Usanova, M.   +19 more
core   +3 more sources

On the Impacts of Ions of Ionospheric Origin and Their Composition on Magnetospheric EMIC Waves

Frontiers in Astronomy and Space Sciences, 2021
Large numbers of theory and observation studies have been conducted on electromagnetic ion cyclotron (EMIC) waves occurring in Earth’s magnetosphere.
Justin H. Lee, Lauren W. Blum, Lunjin Chen   +2 more
doaj   +1 more source

Wave-induced loss of ultra-relativistic electrons in the Van Allen radiation belts. [PDF]

, 2016
The dipole configuration of the Earth's magnetic field allows for the trapping of highly energetic particles, which form the radiation belts. Although significant advances have been made in understanding the acceleration mechanisms in the radiation belts,
Agapitov, Oleksiy V, Aseev, Nikita A, Baker, Daniel N, Drozdov, Alexander Y, Engebretson, Mark J, Kellerman, Adam C, Raita, Tero J, Shprits, Yuri Y, Spasojevic, Maria, Spence, Harlan E, Usanova, Maria E, Zhelavskaya, Irina S, Zhu, Hui   +12 more
core   +1 more source