Results 31 to 40 of about 24,672 (257)

DYNAMICS OF THE FIELD-ALIGNED CURRENTS DISTRIBUTION ASYMMETRY DURING SUBSTORMS IN THE EQUINOX SEASON

Solar-Terrestrial Physics, 2021
We continue to study the physical processes occurring during the August 17, 2001 magnetospheric storm by analyzing the dynamics of the intensity of field-aligned currents (FACs) in Iijima—Potemra Region 1 in the polar ionospheres of two hemispheres ...
V.V. Mishin, V.M. Mishin, M.A. Kurikalova   +2 more
doaj   +1 more source

Swarm Observations of Dawn/Dusk Asymmetries Between Pedersen Conductance in Upward and Downward Field‐Aligned Current Regions

Earth and Space Science, 2021
The locations of region 1 and 2 field‐aligned current systems were determined using fluxgate magnetometer measurements from 875 dawn‐dusk passes of the Swarm A satellite.
L. Olifer, C. Feltman, R. Ghaffari, S. Henderson, D. Huyghebaert, J. Burchill, A. N. Jaynes, D. Knudsen, K. McWilliams, J. I. Moen, A. Spicher, J. Wu   +11 more
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Strong Nonideal Electric Fields and Energy Dissipation Observed by MMS within Field-Aligned Current Layers in the Plasma Sheet of the Earth’s Magnetotail

Atmosphere, 2023
We report the MMS observations of the intense spikes of field-aligned current (FAC) produced by magnetic reconnection at the plasma sheet (PS) field lines.
Makar V. Leonenko, Elena E. Grigorenko, Lev M. Zelenyi   +2 more
doaj   +1 more source

STARE: Observations of a field‐aligned line current

Geophysical Research Letters, 1999
For the first time a magnetospheric line current entering the ionosphere has been unambiguously observed. The observation was made with STARE ( = Scandinavian Twin Auroral Radar Experiment), a ground based coherent radar system, which has been updated with modern computer technique, and recently taken into operation.
Nielsen, E., Bruns, M., Pardowitz, I., Perplies, H., Bemmann, L., Janhunen, P., Huuskonen, A.   +6 more
openaire   +2 more sources

SwarmFACE: A Python package for field-aligned currents exploration with Swarm

Frontiers in Astronomy and Space Sciences, 2023
The SwarmFACE package utilizes magnetic field measurements by the Swarm satellites to study systems of field-aligned currents (FACs). Improvements of well-established techniques as well as novel single- and multi-satellite methods or satellite ...
Adrian Blagau, Adrian Blagau, Joachim Vogt   +2 more
doaj   +1 more source

Field‐aligned current distribution in the transition current system [PDF]

Journal of Geophysical Research: Space Physics, 2004
The interactions of coronal mass ejections with the Earth's magnetosphere are interesting because they often lead to extreme forcing of magnetospheric convection. Here we consider the initial interaction of a CME with the magnetosphere for the specific case in which there is a sharp increase in the dynamic pressure (interplanetary shock) that is ...
Belenkaya, Elena S., Alexeev, Igor I., Clauer, C. Robert   +2 more
openaire   +2 more sources

Timescales of Birkeland Currents Driven by the IMF

Geophysical Research Letters, 2019
We obtain current densities from the Active Magnetosphere and Planetary Electrodynamics Response Experiment (AMPERE), alongside By and Bz from the Interplanetary Magnetic Field (IMF) for March 2010.
John C. Coxon, Robert M. Shore, Mervyn P. Freeman, Robert C. Fear, Stephen D. Browett, Andrew W. Smith, Daniel K. Whiter, Brian J. Anderson   +7 more
doaj   +1 more source

High‐Latitude Electrodynamics Specified in SAMI3 Using AMPERE Field‐Aligned Currents

Space Weather, 2022
A new technique has been developed to determine the high‐latitude electric potential from observed field‐aligned currents (FACs) and modeled ionospheric conductances.
A. T. Chartier, J. D. Huba, D. P. Sitaram, V. G. Merkin, B. J. Anderson, S. K. Vines   +5 more
doaj   +1 more source

Swarm field-aligned currents during a severe magnetic storm of September 2017 [PDF]

Annales Geophysicae, 2020
Swarm satellite observations are used to characterize the extreme behavior of large- and small-scale field-aligned currents (FACs) during the severe magnetic storm of September 2017.
R. Lukianova
doaj   +1 more source

Thinning of field‐aligned currents

Geophysical Research Letters, 1982
It is common to describe the field‐aligned currents associated with auroral arcs in terms of an Alfven wave propagating earthward. Taking account of convection, the wave can be stationary relative to the earth with its normal nearly perpendicular to the field. Far enough ahead of the wave linear theory is valid and here theory is restricted to both the
openaire   +1 more source