Search Publications
The Response of the Venusian Plasma Environment to the Passage of an ICME: Hybrid Simulation Results and Venus Express Observations
Coates, A. J.; Kallio, E.; Futaana, Y. +6 more
Owing to the heritage of previous missions such as the Pioneer Venus Orbiter and Venus Express, the typical global plasma environment of Venus is relatively well understood. On the other hand, this is not true for more extreme driving conditions such as during passages of interplanetary coronal mass ejections (ICMEs). One of the outstanding questi…
The Formation of an Oxygen Wave by Magnetic Reconnection
Tenfjord, P.; Hesse, M.; Norgren, C.
Oxygen of ionospheric origin is a ubiquitous particle species in magnetospheric dynamics. We investigate how an oxygen population influences magnetic reconnection and how it is energized, using particle-in-cell simulations. The oxygen population is inserted initially in the inflow region, at two equal distances above and below the current sheet, a…
Magnetosheath Reconnection Before Magnetopause Reconnection Driven by Interplanetary Tangential Discontinuity: A Three-Dimensional Global Hybrid Simulation With Oblique Interplanetary Magnetic Field
Wang, Xueyi; Lin, Yu; Du, Aimin +1 more
Terrestrial dayside dynamics associated with a southward turning, oblique interplanetary magnetic field (IMF) carried by an interplanetary tangential discontinuity (TD) is investigated by performing a three-dimensional global-scale hybrid simulation systematically for cases in which the incoming solar wind TD possesses various magnetic field rotat…
Statistical Study of Magnetic Topology for Eruptive and Confined Solar Flares
Xu, Yan; Wang, Haimin; Liu, Siqing +1 more
Large flares and halo coronal mass ejections (CMEs) can often cause strong space environment disturbances and sequently a series of space environment effects. The X-class flares associated with halo CMEs are particular prone to these effects. In this paper, 58 X-class flares were collected and studied with the source locations in 30° from the disk…
Plasmaspheric Plumes and EMIC Rising Tone Emissions
Dandouras, I.; Santolík, O.; Cornilleau-Wehrlin, N. +4 more
Due to its polar orbit Cluster spacecraft crossed plasmaspheric plumes out of the magnetic equatorial plane. We study the occurrence of broadband, narrowband, and rising tone emissions in the plume vicinity, below the local proton gyrofrequency. Based on a database of 935 Cluster plumes crossings, reduced to 189 unique plumes, we find that broadba…
Magnetic Fluctuations and Turbulence in the Venusian Magnetosheath Downstream of Different Types of Bow Shock
Zhang, T. L.; Vörös, Z.; Xiao, S. D.
We statistically examine the characteristic scaling features of fluctuations in the dayside Venusian magnetosheath downstream of different types, quasi-parallel (Q∥) and quasi-perpendicular (Q⊥), of bow shock based on Venus Express data. We found that magnetic fluctuations have different characteristic scaling features downst…
Response of Earth's Neutral Sheet to Reversals in the IMF By Component
Haaland, S.; Case, N. A.; Nagai, T. +2 more
The By component of the interplanetary magnetic field (IMF) plays an integral part in the coupling of the solar wind-magnetosphere-ionosphere system. In this study, we use a suite of magnetospheric spacecraft, with data spanning nearly 25 years, to statistically investigate the control of the IMF By component on the neutral s…
Cluster Observations of a Dispersive Flapping Event of Magnetotail Current Sheet
Petrukovich, A. A.; Wei, Y.; Lui, A. T. Y. +5 more
A kink-like flapping event of Earth magnetotail current sheet, which consists of two frequency bands successively, is studied by the multipoint observations of Cluster. The multipoint analysis of Cluster observations demonstrates that the higher frequency band (period is about 10 min) has faster propagation velocity (about 30 km/s), shorter wavele…
Tailward Propagation of Magnetic Energy Density Variations With Respect to Substorm Onset Times
Jackman, Caitriona M.; Coxon, John C.; Freeman, Mervyn P. +3 more
During geomagnetic substorms, around 1015 J of energy is extracted from the solar wind and processed by the Earth's magnetosphere. Prior to the onset of substorm expansion phases, this energy is thought to be largely stored as an increase in the magnetic field in the magnetotail lobes. However, how, when, and where this energy is stored…
The Influence of IMF By on the Bow Shock: Observation Result
Li, G.; Wang, M.; Zhao, J. S. +4 more
In this study we use the bow shock crossings contained in the Space Physics Data Facility database, collected by four spacecraft (IMP 8, Geotail, Magion-4, and Cluster1) to analyze the effect of the interplanetary magnetic field (IMF) By component on the bow shock position and shape. Although the IMF Bz component is usually c…