Search Publications
Cluster observations of ``crater'' flux transfer events at the dayside high-latitude magnetopause
Balogh, A.; RèMe, H.; Fazakerley, A. N. +7 more
On 11 January 2002 Cluster detected two "crater"-like flux transfer event (FTE) signatures. The four spacecraft were in quasi-linear formation, spread over ∼2 RE in the magnetopause normal direction, and sample a range of distances from it. The observations occur near a southward turning of the IMF, but no solar wind pressure pulses are…
Statistical properties of tail plasma sheet electrons above 40 keV
Lavraud, B.; Daly, P.; Taylor, M. G. G. T. +3 more
We use data from four tail seasons (2001-2004) of the Cluster spacecraft to study statistical features of energetic electrons (40-400 keV) in the magnetotail plasma sheet in combination with plasma parameters and indices of geomagnetic activity. We find that the horizontal magnetic field magnitude best orders the energetic electron observations. U…
Response of the inner magnetosphere and the plasma sheet to a sudden impulse
Zhang, T. L.; Dandouras, I.; RèMe, H. +11 more
The passage of an interplanetary shock caused a sudden compression of the magnetosphere between 0900 UT and 0915 UT on 24 August 2005. An estimate of the shock normal from solar wind data obtained by Geotail upstream of the bow shock indicates symmetric compression with respect to the noon-midnight meridian. Compression-related disturbances of the…
Enceladus: A potential source of ammonia products and molecular nitrogen for Saturn's magnetosphere
Johnson, R. E.; Sittler, E. C.; Smith, H. T. +5 more
The detection of nitrogen species in Saturn's magnetosphere could, in principle, provide clues to the origin and evolution of its satellites and tenuous rings. Smith et al. (2005) first identified low-energy N+ using the Cassini Plasma Spectrometer (CAPS). N+ was predominantly seen in the Saturn's inner magnetosphere (<∼14…
Three-dimensional MHD modeling of the global corona throughout solar cycle 23
Wu, S. T.; Feng, X. S.; Song, W. B. +1 more
Based on the space-time conservation element and solution element (CESE) method, we have recently developed a novel 3D magnetohydrodynamic (MHD) model for the solar corona and interplanetary study. Our aim here is to describe the application of this new MHD model to study the global coronal magnetic structures by using the observed line-of-sight p…
Comparison of periodic substorms at Jupiter and Earth
Krupp, N.; Woch, J.; Lagg, A. +3 more
The Energetic Particles Detector and magnetometer measurements on Galileo showed that the Jovian magnetosphere undergoes reconfiguration processes which are very similar to the characteristics of a terrestrial substorm. At Jupiter the reconfiguration process occurs quasi-periodically with a repetition period of several days. In the terrestrial mag…
Formation of the low-latitude boundary layer and cusp under the northward IMF: Simultaneous observations by Cluster and Double Star
Dandouras, I.; Davies, J. A.; Wild, J. A. +9 more
On 28 February 2004 the configuration of the Cluster and Double Star TC1 satellites facilitated a simultaneous study of plasma properties inside the low-latitude boundary layer (LLBL) near the subsolar magnetopause and inside the midaltitude cusp during an interval with strong northward IMF. TC1, crossing the dayside magnetopause, observed a compl…
Combining remote and in situ observations of coronal mass ejections to better constrain magnetic cloud reconstruction
Owens, M. J.
Determination of the nonradial extent of magnetic clouds (MCs) is vital for two key reasons. First, it affects the amount of "drag" a fast MC experiences and therefore controls the travel time from the Sun to 1-AU, a critical parameter for space-weather prediction. Second, it is vital to estimating the flux content of MCs, which in turn is importa…
A magnetic null geometry reconstructed from Cluster spacecraft observations
Escoubet, C. P.; Dandouras, I.; Glassmeier, K. -H. +15 more
This paper reports for the first time the identification of a magnetic structure around a magnetic null in a magnetic reconnection region in the magnetotail. Magnetic reconnection is one of the fundamental processes in astrophysical and solar-terrestrial plasmas. Though the concept of reconnection has been studied for many years, the process that …
Parametric analysis of positive amplitude electron acoustic solitary waves in a magnetized plasma and its application to boundary layers
Winningham, J. D.; Lakhina, G. S.; Pickett, J. S. +3 more
The existence domain of a fully nonlinear positive amplitude electron acoustic solitary wave has been studied in a four-component plasma composed of warm magnetized electrons, warm electron beam, and energetic multi-ion species with ions hotter than the electrons (Ti > Te). A Sagdeev pseudopotential technique has been used…