Search Publications
Equatorial noise: Statistical study of its localization and the derived number density
Maksimovic, M.; de Conchy, Y.; Santolík, O. +5 more
Results of a statistical study of equatorial noise emissions are presented. These electromagnetic emissions are observed in the inner magnetosphere in the vicinity of the geomagnetic equator at frequencies below the lower hybrid frequency. We use the data recorded by four Cluster spacecraft during years 2001-2003. The data set was processed in thr…
Observations of electrostatic solitary waves associated with reconnection by Geotail and Cluster
Gurnett, D. A.; Pickett, J. S.; Fazakerley, A. N. +8 more
We report the observations of Electrostatic Solitary Waves (ESWs) associated with reconnection by the Wideband Plasma Wave Receiver of Cluster and the Wave From Captures of Geotail near the diffusion region at dayside magnetopause and in the magnetotail region. ESWs have been observed along the plasma sheet boundary and near diffusion region, both…
CLUSTER spacecraft observation of a thin current sheet at the Earth’s magnetopause
Fränz, M.; Dandouras, I.; Khotyaintsev, Y. +7 more
On March 30, 2002 within 17 min the four CLUSTER spacecraft crossed the Earth’s high-latitude magnetopause three times. We found that all three magnetopause current sheets are nearly co-planar on the scales of the CLUSTER spacecraft separation. The thickness of the current sheets changes from 1 to 40 magnetosheath-proton thermal gyro-radii. The th…
The role of the Hall effect in collisionless magnetic reconnection
Nakamura, R.; Scholer, M.; Runov, A. +2 more
A short review of the role of the Hall effect in collisionless reconnection is given in relation to observations in the upper auroral ionosphere during substorm-reconnection events. We clarify the conditions when the Hall effect should be of importance and when the ion inertial length is the responsible scale which is the case for β⊥ &g…
Cluster satellite observations of mHz pulsations in the dayside magnetosphere
Glassmeier, K. -H.; Blomberg, L. G.; Eriksson, P. T. I.
On 17 August 2002 the Cluster spacecraft moved through the dayside magnetosphere. Between 16:00 and 18:30 UT clear monochromatic oscillations are seen in both electric field and magnetometer data. The frequency is 4.2 mHz in the spacecraft frame of reference. The oscillations have a clear spatial localisation. The magnetic field oscillations are r…
A statistical survey of the magnetotail current sheet
Balogh, A.; Zhang, T. L.; Nakamura, R. +8 more
Using Cluster magnetometer data during summer 2001 and 2002, when the spacecraft traversed the magnetotail, we have performed a survey of current sheet and its current. We applied a superposed epoch analysis to simple, monotonous current sheet crossings and obtained a statistical profile of the current sheet. We find that the averaged structure of…
Distributions of suprathermal ions near hot flow anomalies observed by RAPID aboard Cluster
Dandouras, I.; Facskó, G.; Daly, P. +4 more
A series of events having signatures of hot flow anomalies (HFA) observed by the magnetic field, plasma, and energetic particle instruments aboard the Cluster spacecraft upstream of the Earth's bow shock in February-April 2003 are investigated. During this period, the separation of the four satellites (up to about 10,000 km) allowed determining th…
Multi-point study of the magnetotail current sheet
Nakamura, R.; Baumjohann, W.; Runov, A.
This review summarizes the magnetotail current sheet observations by the Cluster spacecraft during July-October 2001. Due to four-point measurements and the tetrahedron configuration of the spacecraft constellation we are able to separate spatial and temporal variations and to estimate gradients and characteristic scales of structures in the curre…
Detailed analysis of low-energy electron streaming in the near-Earth neutral line region during a substorm
Balogh, A.; Fazakerley, A. N.; Klecker, B. +11 more
A synaptic view of Cluster FGM, CIS, EDI, and PEACE observations of the near-Earth neutral line region during 1800 1830 UT on 13 September 2002 is discussed. Associated with the flow reversal and a thin cross-tail current sheet, a clear signature of a quadrupolar magnetic field is observed, which indicates the formation of the Hall current system …
The changing topology of the duskside magnetopause boundary layer in relation to IMF orientation
Farrugia, C. J.; Wild, J. A.; Kistler, L. M. +9 more
On 7 December 2000, Cluster made an extended outbound radial traversal of the duskside magnetopause boundary layer. The long duration of the crossing, during which Cluster spent several hours within 2RE of the nominal magnetopause, allows us to deconvolve the structure of this boundary layer in its dependence on interplanetary parameter…