Search Publications
Data-based modelling of the Earth's dynamic magnetosphere: a review
Tsyganenko, N. A.
This paper reviews the main advances in the area of data-based modelling of the Earth's distant magnetic field achieved during the last two decades. The essence and the principal goal of the approach is to extract maximum information from available data, using physically realistic and flexible mathematical structures, parameterized by the most rel…
Parametric validations of analytical lifetime estimates for radiation belt electron diffusion by whistler waves
Artemyev, A. V.; Agapitov, O. V.; Krasnoselskikh, V. V. +1 more
The lifetimes of electrons trapped in Earth's radiation belts can be calculated from quasi-linear pitch-angle diffusion by whistler-mode waves, provided that their frequency spectrum is broad enough and/or their average amplitude is not too large. Extensive comparisons between improved analytical lifetime estimates and full numerical calculations …
Discontinuities and Alfvénic fluctuations in the solar wind
Haaland, S.; Paschmann, G.; Knetter, T. +1 more
We examine the Alfvénicity of a set of 188 solar wind directional discontinuities (DDs) identified in the Cluster data from 2003 by Knetter (2005), with the objective of separating rotational discontinuities (RDs) from tangential ones (TDs). The DDs occurred over the full range of solar wind velocities and magnetic shear angles. By performing the …
Statistical study of foreshock cavitons
Sauvaud, J. -A.; Russell, C. T.; Dandouras, I. +5 more
In this work we perform a statistical analysis of 92 foreshock cavitons observed with the Cluster spacecraft 1 during the period 2001-2006. We analyze time intervals during which the spacecraft was located in the Earth's foreshock with durations longer than 10 min. Together these amount to ~ 50 days. The cavitons are transient structures in the Ea…
Detection of a plasmaspheric wind in the Earth's magnetosphere by the Cluster spacecraft
Dandouras, I.
Plumes, forming at the plasmapause and released outwards, constitute a well-established mode for plasmaspheric material release to the Earth's magnetosphere. They are associated to active periods and the related electric field change. In 1992, Lemaire and Shunk proposed the existence of an additional mode for plasmaspheric material release to the …
Comparative magnetotail flapping: an overview of selected events at Earth, Jupiter and Saturn
André, N.; Jackman, C. M.; Nakamura, R. +9 more
A comparison of magnetotail flapping (the up-and-down wavy motion) between the Earth and the two giant planets Jupiter and Saturn has been performed through investigation of the current sheet normal of the magnetotail. Magnetotail flapping is commonly observed in the Earth's magnetotail. Due to single spacecraft missions at the giant planets, the …
Dispersion relation analysis of turbulent magnetic field fluctuations in fast solar wind
Glassmeier, K. -H.; Narita, Y.; Perschke, C. +2 more
Physical processes of the energy transport in solar wind turbulence are a subject of intense studies, and different ideas exist to explain them. This manuscript describes the investigation of dispersion properties in short-wavelength magnetic turbulence during a rare high-speed solar wind event with a flow velocity of about 700 km s-1 u…
Profiles of electron temperature and Bz along Earth's magnetotail
Petrukovich, A. A.; Zelenyi, L. M.; Nakamura, R. +1 more
We study the electron temperature distribution and the structure of the current sheet along the magnetotail using simultaneous observations from THEMIS spacecraft. We perform a statistical study of 40 crossings of the current sheet when the three spacecraft THB, THC, and THD were distributed along the tail in the vicinity of midnight with coordina…
Dispersion of low frequency plasma waves upstream of the quasi-perpendicular terrestrial bow shock
Walker, S. N.; Balikhin, M. A.; Pope, S. A. +1 more
Low frequency waves in the foot of a supercritical quasi-perpendicular shock front have been observed since the very early in situ observations of the terrestrial bow shock (Guha et al., 1972). The great attention that has been devoted to these type of waves since the first observations is explained by the key role attributed to them in the proces…
Ray tracing of whistler-mode chorus elements: implications for generation mechanisms of rising and falling tone emissions
Nunn, D.; Omura, Y.; Yamaguchi, K. +1 more
Using a well-established magnetospheric very-low-frequency (VLF) ray tracing method, in this work we trace the propagation of individual rising- and falling-frequency elements of VLF chorus from their generation point in the equatorial region of the magnetosphere through to at least one reflection at the lower-hybrid resonance point. Unlike recent…