Search Publications
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…
Nonlobe Reconnection at the Earth's Magnetopause for Northward IMF
Lavraud, B.; Fuselier, S. A.; Trattner, K. J. +2 more
Under northward interplanetary magnetic field conditions, magnetic reconnection at the Earth's magnetopause is usually thought to operate through the merging of magnetosheath magnetic field lines and open magnetic field lines from the magnetospheric lobe. However, reconnection also occurs between magnetosheath field lines and closed magnetic field…
Mass Composition of the Escaping Flux at Mars: MEX Observations
Nilsson, H.; Rojas-Castillo, D.; Stenberg Wieser, G.
Using more than 7 years of ion measurements from the ASPERA-3/IMA instrument onboard the Mars Express mission, we analyze the mass composition of the two main outflowing heavy ion species O2+ and O+. Using an improved multispecies fitting technique, we discriminate the molecular from atomic oxygen ion population. W…
The Dusty Plasma Disk Around the Janus/Epimetheus Ring
Gurnett, D. A.; Persoon, A. M.; Kurth, W. S. +5 more
We report on the electron, ion, and dust number densities and the electron temperatures obtained by the Radio and Plasma Wave Science instruments onboard Cassini during the Ring-Grazing orbits. The numerous ring passage observations show a consistent picture as follows: (1) Beyond 0.1 RS above and below the equator the electron and ion …