Search Publications
On the correlation between Broad-Band ELF wave power and ion fluxes in the cusp
Jacobsen, K. S.; Moen, J. I.
We present a study of Broad-Band Extremely Low Frequency (BB-ELF) electric fields in the mid-altitude (4-6 Earth radii) cusp during periods of southward interplanetary magnetic field, using data from the Cluster spacecraft. Magnetospheric boundary layers are identified and classified according to particle precipitation characteristics. We find tha…
On the modeling of planetary plasma environments by a fully kinetic electromagnetic global model HYB-em
Kallio, E.; Pohjola, V.
We have developed a fully kinetic electromagnetic model to study instabilities and waves in planetary plasma environments. In the particle-in-a-cell (PIC) model both ions and electrons are modeled as particles. An important feature of the developed global kinetic model, called HYB-em, compared to other electromagnetic codes is that it is built up …
The influence of Titan on Saturn kilometric radiation
Cecconi, B.; Ye, S. -Y.; Menietti, J. D. +1 more
Previous studies have shown that the occurrence probability of Saturn Kilometric Radiation (SKR) appears to be influenced by the local time of Titan. Using a more extensive set of data than the original study, we confirm the correlation of higher occurrence probability of SKR when Titan is located near local midnight. In addition, the direction fi…
A new technique for determining orientation and motion of a 2-D, non-planar magnetopause
Marghitu, O.; Klecker, B.; Scholer, M. +3 more
For a four-point mission like Cluster, the differences in position and time when the satellites detect the magnetopause or any other discontinuity, can be used to infer the discontinuity local orientation, thickness and motion. This timing technique, commonly assuming a planar geometry, offers an independent check for various single-spacecraft tec…
Corrigendum to "Substorm activity in Venus's magnetotail" published in Ann. Geophys., 27, 2321-2330, doi:10.5194/angeo-27-2321-2009, 2009
Barabash, S.; Futaana, Y.; Zhang, T. L. +5 more
A re-evaluation of the reconnection event reported by Volwerk et al. (2009) shows that the original interpretation of the magnetic field data as quadrupolar Hall-current signatures around a reconnection site was mistaken. It could be interpreted as the signature of reconnection in the presence of a guide field. The path of VEX through the active r…
Geomagnetic activity effects on plasma sheet energy conversion
Dandouras, I.; Hamrin, M.; Norqvist, P. +4 more
In this article we use three years (2001, 2002, and 2004) of Cluster plasma sheet data to investigate what happens to localized energy conversion regions (ECRs) in the plasma sheet during times of high magnetospheric activity. By examining variations in the power density, E·J, where E is the electric field and J is the current density obtained by …
The large-scale magnetospheric electric field observed by Double Star TC-1
Rème, H.; Carr, C.; Liu, Z. X. +4 more
The relationship between the average structure of the inner magnetospheric large-scale electric field and geomagnetic activity levels has been investigated by Double Star TC-1 data for radial distances ρ between 4.5 RE and 12.5 RE and MLT between 18:00 h and 06:00 h from July to October in 2004 and 2005. The sunward component…