Results 51 to 60 of about 18,045 (247)

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
openaire   +1 more source

Prompt Emergence and Disappearance of EMIC Waves Driven by the Sequentially Enhanced Solar Wind Dynamic Pressure

Geophysical Research Letters, 2021
Van Allen Probes (VAPs) and multiple ground‐based stations simultaneously observed prompt emergences and disappearances of electromagnetic ion cyclotron (EMIC) waves driven by the sequentially enhanced solar wind dynamic pressures in the dayside inner ...
Zuxiang Xue, Zhigang Yuan, Xiongdong Yu
doaj   +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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Ion observations from geosynchronous orbit as a proxy for ion cyclotron wave growth during storm times [PDF]

, 2009
[1] There is still much to be understood about the processes contributing to relativistic electron enhancements and losses in the radiation belts.
Blum, L. W., Gary, S. P., MacDonald, E. A., Spence, Harlan E., Thomsen, M. F.   +4 more
core   +2 more sources

Association Between EMIC Wave Occurrence and Enhanced Convection Periods During Ion Injections

Geophysical Research Letters, 2020
Electromagnetic ion cyclotron (EMIC) waves tend to occur during geomagnetic storms and solar wind pressure pulses. However, they have also been regularly observed even in the absence of these two drivers.
B. Remya, D. G. Sibeck, J. M. Ruohoniemi, B. Kunduri, A. J. Halford, G. D. Reeves, R. V. Reddy   +6 more
doaj   +1 more source

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

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
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Modeling inward diffusion and slow decay of energetic electrons in the Earth\u27s outer radiation belt [PDF]

, 2015
A new 3-D diffusion code is used to investigate the inward intrusion and slow decay of energetic radiation belt electrons (\u3e0.5 MeV) observed by the Van Allen Probes during a 10 day quiet period on March 2013.
Angelopoulos, V., Baker, D. N., Blake, J. B., Claudepierre, S., Fennell, J. F., Henderson, M. G., Hospodarsky, G. B., Kletzing, C A., Kurth, W. S., Li, W., Ma, Q., Ni, B., Reeves, Geoffrey, Spence, Harlan E., Thorne, R. M.   +14 more
core   +4 more sources

The modulation of electromagnetic ion cyclotron waves by Pc 5 ULF waves [PDF]

Annales Geophysicae, 2009
The modulation of electromagnetic ion cyclotron (EMIC) waves by longer-period ULF waves has been proposed as a method for producing pearl structured Pc 1–2 EMIC waves.
T. M. Loto'aniu, T. M. Loto'aniu, B. J. Fraser, C. L. Waters   +3 more
doaj   +1 more source

A summary of the BARREL campaigns: Technique for studying electron precipitation. [PDF]

, 2015
BARREL observed electron precipitation over wide range of energy and timescalesPrecipitating electron distribution is determined using spectroscopy for 19 January 2013 eventBARREL timing data has accuracy within sampling interval of 0.05 ...
Anderson, BR, Bowers, GS, Halford, AJ, Liang, X, McCarthy, MP, Millan, RM, Sample, JG, Smith, DM, Woodger, LA   +8 more
core   +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   +1 more source