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   Articles with "emic waves" as a keyword



Statistical study of EMIC Pc1-Pc2 waves observed at subauroral latitudes

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recommendations! Published in 2020 at "Journal of Atmospheric and Solar-Terrestrial Physics"

DOI: 10.1016/j.jastp.2020.105292

Abstract: Abstract Although the occurrence rate of electromagnetic ion cyclotron (EMIC) waves is high in the outer magnetosphere (L > 7), it has been suggested in the past that a steep plasma density gradient region of the plasmapause… read more here.

Keywords: waves observed; pc2 waves; emic waves; pc1 pc2 ... See more keywords

Effect of Hot He+ Ions on the Electron Pitch Angle Scattering Driven by H+, He+, and O+ Band EMIC Waves

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recommendations! Published in 2019 at "Geophysical Research Letters"

DOI: 10.1029/2019gl083456

Abstract: In this paper, we find that hot He+ ions significantly alter the kinetic dispersion relation of electromagnetic ion cyclotron (EMIC) waves and thus strongly affect the wave‐driven electron pitch angle scattering rates. Increasing hot He+… read more here.

Keywords: angle scattering; band emic; hot ions; pitch angle ... See more keywords

Occurrence of EMIC Waves in the Magnetosphere According to Their Distance to the Magnetopause

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recommendations! Published in 2021 at "Geophysical Research Letters"

DOI: 10.1029/2020gl090921

Abstract: Wave growth of electromagnetic ion cyclotron (EMIC) emissions observed in the outer magnetosphere is mainly controlled by compression events resulting from solar wind dynamic pressure pulses. During such events wave growth is expected to be… read more here.

Keywords: waves magnetosphere; according distance; distance; occurrence emic ... See more keywords
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Local Time and Longitudinal Differences in the Occurrence Frequency of Ionospheric EMIC Waves During Magnetic Storm Periods

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recommendations! Published in 2021 at "Journal of Geophysical Research"

DOI: 10.1029/2020ja028878

Abstract: The spatial and temporal distributions of ionospheric electromagnetic ion cyclotron (EMIC) waves during magnetic storms from 2014 to 2018 were studied using Swarm observations. Ionospheric EMIC waves preferably occurred during storms and their recovery phases… read more here.

Keywords: emic waves; local time; storm; occurrence frequency ... See more keywords

Depletions of Multi‐MeV Electrons and Their Association to Minima in Phase Space Density

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recommendations! Published in 2022 at "Geophysical Research Letters"

DOI: 10.1029/2021gl097620

Abstract: Fast‐localized electron loss, resulting from interactions with electromagnetic ion cyclotron (EMIC) waves, can produce deepening minima in phase space density (PSD) radial profiles. Here, we perform a statistical analysis of local PSD minima to quantify… read more here.

Keywords: emic waves; phase space; minima phase; space density ... See more keywords

Amplitude Dependence of Nonlinear Precipitation Blocking of Relativistic Electrons by Large Amplitude EMIC Waves

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recommendations! Published in 2022 at "Geophysical Research Letters"

DOI: 10.1029/2022gl098365

Abstract: Recent work has shown that ElectroMagnetic Ion Cyclotron (EMIC) waves tend to occur in four distinct regions, each having their own characteristics and morphology. Here, we use nonlinear test‐particle simulations to examine the range of… read more here.

Keywords: emic waves; density; dependence nonlinear; nonlinear precipitation ... See more keywords

A Triggering Process for Nonlinear EMIC Waves Driven by the Compression of the Dayside Magnetosphere

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recommendations! Published in 2024 at "Geophysical Research Letters"

DOI: 10.1029/2023gl106860

Abstract: Using the Arase and Van Allen Probes satellite observations, we investigate the nonlinear electromagnetic ion cyclotron (EMIC) rising‐tone (RT) emissions with an increase of the solar wind dynamic pressure in the dayside magnetosphere. We find… read more here.

Keywords: threshold amplitude; dayside magnetosphere; nonlinear emic; compression ... See more keywords

On the Spatial and Temporal Evolution of EMIC Wave‐Driven Relativistic Electron Precipitation: Magnetically Conjugate Observations From the Van Allen Probes and CALET

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recommendations! Published in 2024 at "Geophysical Research Letters"

DOI: 10.1029/2023gl107087

Abstract: Electromagnetic ion cyclotron (EMIC) waves have been shown to be able to drive strong electron precipitation, particularly at MeV energies. However, the spatio‐temporal evolution of both the waves and the resulting precipitation is still not… read more here.

Keywords: emic waves; temporal evolution; precipitation; electron precipitation ... See more keywords

Electron Precipitation Driven by EMIC Waves: Two Types of Energy Dispersion

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recommendations! Published in 2024 at "Geophysical Research Letters"

DOI: 10.1029/2023gl107604

Abstract: Electromagnetic ion cyclotron (EMIC) waves can very rapidly and effectively scatter relativistic electrons into the atmosphere. EMIC‐driven precipitation bursts can be detected by low‐altitude spacecraft, and analysis of the fine structure of such bursts may… read more here.

Keywords: emic waves; precipitation; electron precipitation; energy dispersion ... See more keywords

Modulation of ion pitch angle in the presence of large-amplitude, electromagnetic ion cyclotron (EMIC) waves: 1D hybrid simulation

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recommendations! Published in 2020 at "Physics of Plasmas"

DOI: 10.1063/5.0019769

Abstract: Large-amplitude electromagnetic ion cyclotron (EMIC) waves induce unique dynamics of charged particle movement in the magnetosphere. In a recent study, modulation of the ion pitch angle in the presence of large-amplitude EMIC waves is observed,… read more here.

Keywords: emic waves; ion; modulation; pitch angle ... See more keywords

Generation of EMIC Waves in the Magnetosphere and Precipitation of Energetic Protons: Comparison of the Data from THEMIS High Earth Orbiting Satellites and POES Low Earth Orbiting Satellites

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recommendations! Published in 2018 at "Geomagnetism and Aeronomy"

DOI: 10.1134/s0016793218040114

Abstract: Regions of the detection of electromagnetic ion-cyclotron (EMIC) waves on the THEMIS satellites near the equatorial plane and the precipitation of energetic protons on POES low Earth orbiting satellites are compared with the magnetospheric magnetic… read more here.

Keywords: low earth; earth orbiting; energetic protons; earth ... See more keywords