Explanipedia

Electron Energization by Dispersive Alfvén Waves in the Cusp Open

P. A. Damiano, A. J. Hull, C. C. Chaston, J. R. Johnson, Y. Lin · 2025

The propagation of kinetic Alfvén waves (assumed sourced from intermittent dayside reconnection) is investigated with a gyrofluid‐kinetic electron model compared with Cluster observations. These observations reveal electron distributions t…

Broadband Kinetic Alfvén Waves and the Pitch Angle Distribution of Relativistic Electrons Open

K. C. Barik, C. C. Chaston · 2025

A statistical survey using 3 years of Van Allen Probes data from 2013 to 2015 is conducted to investigate the impact of broadband kinetic Alfvén waves (KAWs) on the pitch angle distributions (PADs) of relativistic electrons. 62 events exhi…

Driving Earth's Outer Radiation Belt With Alfvénic Turbulence Open

C. C. Chaston · 2025

Semi‐empirical coefficients for electron transport in Alfvénic turbulence are used to drive the global evolution of energetic electron distributions through Earth's outer radiation belt. It is shown how these turbulent fields facilitate ra…

Energy transport through Earth’s plasma sheet in 3-D Open

K. C. Barik, C. C. Chaston · 2025

A statistical analysis of energy transport through Earth’s plasma sheet is performed using 6 years of Magnetospheric Multi-Scale (MMS) mission observations. The analysis entails a complete decomposition of the contributions to transport in…

Energy Transport and Conversion Above a Bright Discrete Auroral Arc Open

C. C. Chaston · 2024

Magnetically connected observations of particle distributions and luminosity from the Reimei spacecraft are used to examine energy transport and conversion occurring above a discrete auroral arc. By combining imaging and in situ measuremen…

Pioneer Venus Orbiter Observations of Solar Wind Driven Magnetosonic Waves Interacting With the Dayside Venusian Ionosphere Open

C. M. Fowler, S. Ledvina, C. C. Chaston, Moa Persson, Robin Ramstad , et al. · 2024

We use in situ plasma observations made by the Pioneer Venus Orbiter spacecraft to show for the first time that magnetosonic waves can couple the solar wind to the upper ionosphere and deposit energy there. The waves are generated upstream…

Energy Transport and Conversion Within Earth's Supercritical Bow Shock: The Role of Intense Lower‐Hybrid Whistler Waves Open

A. J. Hull, L. Muschietti, O. V. Agapitov, C. C. Chaston, O. Le Contel , et al. · 2024

Detailed analysis of a high Mach number quasiperpendicular Earth bow shock crossing by the Magnetospheric Multiscale (MMS) spacecraft fleet reveal that lower‐hybrid (LH) whistler waves generated in the shock foot region transport energy pr…

Energy transport in Earth’s magnetotail by fast flows Open

K. C. Barik, C. C. Chaston · 2024

Fast flows characterized by flow speed greater than the convectional speed (≈50 km/s) carry most of the energy and momentum from the magnetotail reconnection site and distribute it throughout the magnetosphere. This input energy play…

Multipoint Cluster Observations of Kinetic Alfvén Waves, Electron Energization, and O+ Ion Outflow Response in the Mid‐Altitude Cusp Associated With Solar Wind Pressure and/or IMF BZ Variations Open

A. J. Hull, C. C. Chaston, P. A. Damiano · 2023

We report the properties of low frequency (LF) electromagnetic fluctuations (≤11 Hz) in relation to input electron and ion outflow response observed by Cluster in the mid‐altitude cusp during high solar wind dynamic pressure P SW and activ…

Electron Scattering, Transport and Energization by Alfvénic Turbulence in Earth's Outer Radiation Belt Open

C. C. Chaston · 2023

The transport of energetic electrons immersed in Alfvénic turbulence in Earth's outer radiation belt is explored. It is shown how electrons subject to the action of an empirically derived 3‐D spectrum of Alfvénic field fluctuations experie…

On the Nature of Ion-to-Electron Scale Field Fluctuations in the Solar Wind: Insight from Artemis Observations, Simulations and Linear Theory Open

C. S. Salem, J. W. Bonnell, C. C. Chaston, K. G. Klein, Luca Franci , et al. · 2023

Recent observational and theoretical work on solar wind turbulence and dissipation suggests that kinetic-scale fluctuations are both heating and isotropizing the solar wind during transit to 1 AU. The nature of these fluctuations and…

Multipoint Observations of Dispersive Scale Alfvénic Field‐Line Resonances Associated With Substorm Auroral Beads Open

A. J. Hull, C. C. Chaston, P. A. Damiano, H. U. Frey, S. Wing · 2023

We present a case study of the field‐aligned current (FAC) systems that transpire within the high‐altitude auroral acceleration region of an “auroral bead” initiated double oval substorm observed on 23 February 2001 by the Cluster fleet. C…

Data files for submission 'Electron Scattering, Transport and Energization by Alfvénic Turbulence in Earth’s Outer Radiation Belt' by C. C. Chaston to Geophysical Research Letters Open

C. C. Chaston · 2023

File Description 1. Wave file: ‘flr_torpol_100_krhoi_01_10_f1.txt’ The file contains the location, plasma parameters and unscaled amplitude quantities for each of the 100 mode solutions at each point along the geomagnetic field at L=5.7 . …

Correction to: The Van Allen Probes Electric Field and Waves Instrument: Science Results, Measurements, and Access to Data Open

A. W. Breneman, J. R. Wygant, S. Tian, C. A. Cattell, S. A. Thaller , et al. · 2022

International audience

The Van Allen Probes Electric Field and Waves Instrument: Science Results, Measurements, and Access to Data Open

A. W. Breneman, J. R. Wygant, S. Tian, C. A. Cattell, S. A. Thaller , et al. · 2022

Flow Channels and the Generation of Alfvénic Turbulence Along Storm‐Time Inner Magnetospheric Field‐Lines Open

C. C. Chaston · 2022

A feature of Earth's storm‐time magnetosphere outside the plasmapause is the occurrence of broad‐spectrum Alfvénic fluctuations. In this letter observations from the Van Allen Probes are compared with 3‐D fluid‐kinetic simulations of an ev…

Electron Energization Signatures in Traveling Kinetic Alfvén Waves at Storm Time Injection Fronts Open

A. J. Hull, P. A. Damiano, C. C. Chaston, J. R. Johnson, G. D. Reeves · 2022

The properties of traveling kinetic Alfvén waves (KAWs) and their role in energizing electrons in the inner magnetosphere during a geomagnetic storm are examined using measurements from the Van Allen Probes and Gyrofluid‐Kinetic Electron (…

Fluid‐Kinetic Variations in the Storm‐Time Inner Magnetosphere Open

C. C. Chaston · 2022

Storm‐time broadband electromagnetic field variations along the interface between the dipolar field of the Earth's inner‐magnetosphere and the stretched fields of the plasma‐sheet are decomposed as a superposition of fluid‐kinetic modes. U…

Electric Field Turbulence in the Solar Wind from MHD down to Electron Scales: Artemis Observations Open

C. S. Salem, J. W. Bonnell, Jordan Huang, C. C. Chaston, Luca Franci , et al. · 2022

Recent observational and theoretical work on solar wind turbulence and dissipation suggests that kinetic-scale fluctuations are both heating and isotropizing the solar wind during transit to 1 AU.  The nature of these flu…

Numerical simulation data for submission to Geophysical Research Letters: 'Flow Channels and the Generation of Alfvénic Turbulence along Storm-time Inner Magnetospheric Field-lines', C. C. Chaston 2022 Open

C. C. Chaston · 2022

Contains data from 3-D numerical simulation of inner magnetospheric flow channels: 1. 2-D data including the stream function, vector potential and normalized density from an equatorial slice through the 3-D simulation volume as a function…

MAVEN Observations of Low Frequency Steepened Magnetosonic Waves and Associated Heating of the Martian Nightside Ionosphere Open

C. M. Fowler, K. G. Hanley, J. P. McFadden, C. C. Chaston, J. W. Bonnell , et al. · 2021

We present Mars Atmosphere and Volatile EvolutioN (MAVEN) observations of low frequency steepened fast magnetosonic waves in the Martian magnetosphere and ionosphere. Solar wind pressure pulses generated in the upstream foreshock region im…

Correction to: Small-Scale Dynamic Aurora Open

Ryuho Kataoka, C. C. Chaston, D. Knudsen, K. A. Lynch, R. L. Lysak , et al. · 2021

A Correction to this paper has been published: 10.1007/s11214-021-00821-y

Particle simulation data for submitted manuscript ' Ion scattering and energization in filamentary structures through Earth's magnetosheath' Open

C. C. Chaston · 2021

IDL save files for proton test particle simulation runs i, ii, and iii, as described in the manuscript. Each file contains time series of the velocity vectors for ions traced through the empirically derived wave model. These are at the sam…

Particle simulation data for submitted manuscript ' Ion scattering and energization in filamentary structures through Earth's magnetosheath' Open

C. C. Chaston · 2021

IDL save files for proton test particle simulation runs i, ii, and iii, as described in the manuscript. Each file contains time series of the velocity vectors for ions traced through the empirically derived wave model. These are at the sam…

An Auroral Alfvén Wave Cascade Open

C. C. Chaston · 2021

Folding, kinking, curling and vortical optical forms are distinctive features of most bright auroral displays. These forms are symptomatic of non-linear forcing of the plasma above auroral arcs resulting from the intensification of electri…

Small-Scale Dynamic Aurora Open

Ryuho Kataoka, C. C. Chaston, D. J. Knudsen, K. A. Lynch, R. L. Lysak , et al. · 2021

High level data products and numerical results for Geophysical Research Letters Submission 'Fluid-Kinetic Variations in the Storm-time Inner Magnetosphere' by C. C. Chaston Open

C. C. Chaston · 2021

These files contain the data used to generate the Figures shown in the submission by Chaston 2021 to Geophysical Research Letters entitled 'Fluid-kinetic variations in the storm time inner-magnetoshere'. The are in the form of IDL save fil…

Electric Field Turbulence in the Solar Wind from MHD down to Electron Scales: Artemis Observations Open

C. S. Salem, J. W. Bonnell, Jordan Huang, E. Hanson, C. C. Chaston , et al. · 2020

Recent observational and theoretical work on solar wind turbulence and dissipation suggests that kinetic-scale fluctuations are both heating and isotropizing the solar wind during transit to 1 AU.  The nature of these flu…

MHD Mode Composition in the Inner Heliosphere from the Parker Solar Probe’s First Perihelion Open

C. C. Chaston, J. W. Bonnell, S. D. Bale, J. C. Kasper, M. Pulupa , et al. · 2020

Field and plasma variations during the first perihelion pass of the Parker Solar Probe ( PSP ) from 53 into 35 solar radii ( R S ) from the Sun and over a frequency range in the spacecraft frame ( f SC ) from 0.0002 to 0.2 Hz are decompose…

Switchbacks in the Solar Magnetic Field: Their Evolution, Their Content, and Their Effects on the Plasma Open

F. S. Mozer, O. V. Agapitov, S. D. Bale, J. W. Bonnell, A. W. Case , et al. · 2020

Switchbacks (rotations of the magnetic field) are observed on the Parker Solar Probe . Their evolution, content, and plasma effects are studied in this paper. The solar wind does not receive a net acceleration from switchbacks that it enco…

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