Search Publications
Flux transfer events simultaneously observed by Polar and Cluster: Flux rope in the subsolar region and flux tube addition to the polar cusp
Russell, C. T.; RèMe, H.; Lucek, E. A. +9 more
In this paper we present observational evidence of a flux transfer event observed simultaneously at low-latitude by Polar and at high-latitude by Cluster. This event occurs on 21 March 2002, when both Cluster and Polar are located near local noon but with a large latitudinal separation. During the event, Cluster is moving outbound from the polar c…
Phase structure of Pc3 waves observed by Cluster and ground stations near the cusp
Dunlop, M. W.; Zong, Q. G.; Liu, Y. H. +4 more
Ground observations of Pc3 ULF waves at high latitude show enhanced pulsation activity near the cusp. To investigate this, typical Pc3 pulsation events from 0920 to 1010 UT on 1 April 2004 have been selected that are simultaneously observed by the Cluster satellites and Zhongshan, Davis, and Mawson magnetometers, Antarctica. When Cluster was locat…
Electron structure of the magnetopause boundary layer: Cluster/Double Star observations
Escoubet, C. P.; Pitout, F.; Zong, Q. -G. +16 more
We present a comparison of two events, monitored by the Double Star and Cluster spacecraft at separate locations on the dayside magnetopause, which exhibit distinct properties at high and low latitudes in the magnetopause boundary layer during the occurrence of low-latitude reconnection. On 6 April 2004, the four Cluster and TC-1 spacecraft were o…
Interaction evidence between Enceladus' atmosphere and Saturn's magnetosphere
Clarke, J. T.; Wannawichian, S.; Pontius, D. H.
Saturn's ultraviolet (UV) auroras are highly variable, with much of the activity believed to be controlled by conditions in the solar wind. Like Jupiter, Saturn is also expected to have an electrodynamic interaction between the planet's ionosphere and its satellites' atmospheres, a process that is responsible for the moon's auroral footprint compo…
Influence of large-scale interplanetary structures on energetic particle propagation: September 2004 event at Ulysses and ACE
Lario, D.; Lanzerotti, L. J.; Decker, R. B. +1 more
An intense solar energetic particle (SEP) event was detected in September 2004 by near-Earth spacecraft and by Ulysses at 5.4 AU. Characteristics of the intensity and anisotropy time profiles at both heliospheric locations were determined by the presence of a corotating low-density, low-speed, and low-proton-beta βp solar wind stream. T…
Two-stage oscillatory response of the magnetopause to a tangential discontinuity/vortex sheet followed by northward IMF: Cluster observations
Farrugia, C. J.; Kistler, L.; Mouikis, C. +11 more
We discuss the motion and structure of the magnetopause/boundary layer observed by Cluster in response to a joint tangential discontinuity/vortex sheet (TD/VS) observed by the Advanced Composition Explorer spacecraft on 7 December 2000. The observations are then supplemented by theory. Sharp polarity reversals in the east-west components of the fi…
First analyses of planar magnetic structures associated with the Halloween 2003 events from the Earth to Voyager 1 at 93 AU
Intriligator, Devrie S.; Horbury, Timothy S.; Rees, Adam
We perform the first analyses of planar magnetic structures beyond 5 AU. We also perform the first analyses of planar magnetic structures associated with the Halloween 2003 solar events. Our analyses show that planar magnetic structures (PMS) are associated with the interplanetary manifestation of the Halloween 2003 solar events over a wide range …
Complexities of a 3-D plasmoid flux rope as shown by an MHD simulation
Baker, D. N.; Wiltberger, M.; Farr, N. L.
The results of a global magnetohydrodynamic (MHD) simulation of a pair of magnetospheric substorms on 11 August 2002 are presented. Comparisons of data with simulation results reveal a good agreement regarding the sequence of events during substorm development. We give particular emphasis to results in the simulation of a flux rope formed during t…
Medium-latitude sources of plasmaspheric nonthermal continuum radiations observed close to harmonics of the electron gyrofrequency
Grimald, S.; Canu, P.; DéCréAu, P. M. E. +2 more
Nonthermal continuum (NTC) radiation is, with auroral kilometric radiation (AKR), one of the two electromagnetic emissions generated within the Earth's magnetosphere and radiated into space. It is generally believed that NTC is emitted in the plasmapause density gradient after conversion of intense electrostatic waves, present near the magnetic eq…
Variations in the chorus source location deduced from fluctuations of the ambient magnetic field: Comparison of Cluster data and the backward wave oscillator model
Gurnett, D. A.; Pickett, J. S.; Trakhtengerts, V. Y. +5 more
We study the motion of the source region of magnetospheric chorus emissions using multipoint measurements of VLF wave emissions and geomagnetic field onboard the Cluster spacecraft. The geomagnetic field data are matched to a parameterized model of the local magnetic field, and the spatiotemporal dynamics of the magnetic field are obtained on this…