Search Publications
Transient and localized processes in the magnetotail: a review
Zelenyi, L. M.; Sauvaud, J. -A.; Louarn, P. +16 more
Many phenomena in the Earth's magnetotail have characteristic temporal scales of several minutes and spatial scales of a few Earth radii (RE). Examples of such transient and localized mesoscale phenomena are bursty bulk flows, beamlets, energy dispersed ion beams, flux ropes, traveling compression regions, night-side flux transfer event…
Spectra and anisotropy of magnetic fluctuations in the Earth's magnetosheath: Cluster observations
Alexandrova, O.; Mangeney, A.; Lacombe, C.
We investigate the spectral shape, the anisotropy of the wave vector distributions and the anisotropy of the amplitudes of the magnetic fluctuations in the Earth's magnetosheath within a broad range of frequencies [10-3, 10] Hz which corresponds to spatial scales from ~10 to 105 km. We present the first observations of a Kolm…
Statistical analysis of plasmaspheric plumes with Cluster/WHISPER observations
de Keyser, J.; Décréau, P. M. E.; Vallières, X. +2 more
Plasmaspheric plumes have been routinely observed by the four Cluster spacecraft. This paper presents a statistical analysis of plumes observed during five years (from 1 February 2001 to 1 February 2006) based on four-point measurements of the plasmasphere (outside 4 Earth radii) as it is sampled by the spacecraft in a narrow local time sector bef…
IMF dependence of high-latitude thermospheric wind pattern derived from CHAMP cross-track measurements
Liu, H.; Haaland, S. E.; Förster, M. +2 more
Neutral thermospheric wind pattern at high latitudes obtained from cross-track acceleration measurements of the CHAMP satellite above both North and South polar regions are statistically analyzed in their dependence on the Interplanetary Magnetic Field (IMF) direction in the GSM y-z plane (clock angle). We compare this dependency with magnetospher…
The azimuthal extent of three flux transfer events
Dandouras, I.; Fazakerley, A. N.; Lucek, E. A. +3 more
In early 2006, the Cluster spacecraft crossed the dayside magnetopause twice each orbit with the spacecraft at their largest separation of the entire mission (~10 000 km). In this paper, we present in situ observations at this separation size of flux transfer events (FTEs), which are a signature of transient or time-varying magnetopause reconnecti…
Effects on magnetic reconnection of a density asymmetry across the current sheet
André, M.; Khotyaintsev, Y.; Vaivads, A. +8 more
Magnetic configurations of the tilted current sheets in magnetotail
Malova, H. V.; Lucek, E.; Carr, C. +5 more
In this research, the geometrical structures of tilted current sheet and tail flapping waves have been analysed based on multiple spacecraft measurements and some features of the tilted current sheets have been made clear for the first time. The geometrical features of the tilted current sheet revealed in this investigation are as follows: (1) The…
What is the best method to calculate the solar wind propagation delay?
Haaland, S.; Mailyan, B.; Munteanu, C.
We present a statistical study of propagation times of solar wind discontinuities between Advanced Composition Explorer (ACE) spacecraft orbiting the L1 libration point and the Cluster quartet of spacecraft near the Earth's magnetopause. The propagation times for almost 200 events are compared with the predicted times from four different models. T…
Comparison of multi-point measurements of current sheet structure and analytical models
Malova, H. V.; Petrukovich, A. A.; Zelenyi, L. M. +5 more
Current density profiles of 22 thin current sheets, crossed by four Cluster spacecraft in the magnetotail are compared with the self-consistent model of anisotropic 1-D equilibrium, including several species of quasi-adiabatic (transient) ions and drifting electrons. In order to examine ion-scale features of the current density profile Cluster dat…
On the edge of the foreshock: model-data comparisons
Dandouras, I.; Lucek, E.; Omidi, N. +1 more
We present the results of a global hybrid code simulation for the solar wind-interaction with the Earth's magnetosphere during an interval of steady radial IMF. The model predicts a foreshock marked by innumerable localized, correlated, and large amplitude, density and magnetic field strength variations, depressed velocities, and enhanced temperat…