Search Publications
Direct measurements of the Poynting flux associated with convection electric fields in the magnetosphere
Tanaka, T.; Wygant, J.; Nishimura, Y. +6 more
Observations of Poynting fluxes associated with onset of convection electric fields are essential for understanding of electromagnetic energy transport from the solar wind toward the magnetosphere leading to changes in the convection electric field, which is one of the most fundamental parameters in the magnetosphere-ionosphere coupled system. We …
Interaction of Saturn's magnetosphere and its moons: 1. Interaction between corotating plasma and standard obstacles
Russell, C. T.; Khurana, K. K.; Gombosi, T. I. +3 more
The interaction of Saturn's inner magnetosphere with its moons ranges from the addition of significant quantities of gas, dust, and plasma, causing significant consequences for the dynamics and energetics of the entire Saturnian magnetosphere, to the simple absorption of plasma and energetic particles by the icy moons with non-electrically conduct…
Simultaneous observations of reconnection pulses at Cluster and their effects on the cusp aurora observed at the Chinese Yellow River Station
Lester, M.; Lockwood, M.; Dunlop, M. W. +11 more
While the Cluster spacecraft were located near the high-latitude magnetopause, between 1010 and 1040 UT on 16 January 2004, three typical flux transfer event (FTE) signatures were observed. During this interval, simultaneous and conjugated all-sky camera measurements, recorded at Yellow River Station, Svalbard, are available at 630.0 and 557.7 nm …
X line distribution determined from earthward and tailward convective bursty flows in the central plasma sheet
Dunlop, M. W.; Baumjohann, W.; Reme, H. +5 more
With TC-1, Cluster, and Geotail observations, we statistically analyzed earthward and tailward convective bursty flows (CBFs) from 7 to 31 RE to understand the distribution of X lines in the magnetotail. We also analyzed the effect of the solar wind condition on the X lines with ACE satellite observations. The statistical results show t…
Excitation of electron cyclotron harmonic waves in the inner Saturn magnetosphere within local plasma injections
Gurnett, D. A.; Coates, A. J.; Hospodarsky, G. B. +6 more
Strong electron cyclotron harmonic (ECH) waves have been observed by Cassini associated with local plasma injection regions in the Saturnian magnetosphere. Using measured electron distributions from the Cassini plasma spectrometer, we calculated local growth rates and path-integrated wave gain of ECH waves inside an injection event using the HOTRA…
Antiparallel magnetic reconnection rates at the Earth's magnetopause
Fuselier, S. A.; Trattner, K. J.; Petrinec, S. M.
Cluster observations at the Earth's high-latitude magnetopause are combined with magnetic field models to demonstrate that antiparallel reconnection was occurring at the magnetopause for an event on 3 December 2001. Over a 20 min period, the reconnection line passed over the spacecraft on two occasions. In between the encounters with the reconnect…
Modeling anomalous cosmic ray oxygen gradients over successive solar cycles
Potgieter, M. S.; Strauss, R. D.
Cosmic ray drift directions depend both on the charge of the particle population under consideration, as well as the heliospheric magnetic field polarity which oscillates within a ∼22 year cycle. The differences in the cosmic ray drift patterns between successive solar cycles manifest themselves in the sign of the latitudinal cosmic ray gradient. …
Auroral kilometric radiation diurnal, semidiurnal, and shorter-term modulations disentangled by Cassini
Cecconi, B.; Lamy, L.; Zarka, P. +1 more
During the flyby of the Earth by Cassini in 1999, the Radio and Plasma Wave Science (RPWS) instrument recorded a month of quasi-continuous observations of auroral kilometric radiation (AKR). Analyzing the full polarization of incoming radio waves, we found AKR to be 100% circular left-handed (LH) or right-handed (RH). As AKR is emitted predominant…
Multiple harmonic ULF waves in the plasma sheet boundary layer observed by Cluster
RèMe, H.; Owen, C. J.; Keiling, A. +7 more
The passage of the Cluster satellites in a polar orbit through Earth's magnetotail has provided numerous observations of harmonically related Pc 1-2 ULF wave events, with the fundamental near the local proton cyclotron frequency Ωcp. Broughton et al. (2008) reported observations by Cluster of three such events in the plasma sheet bounda…
Some statistical properties of flow bursts in the magnetotail
Kim, Hyun-Sook; Lee, Dae-Young; Ohtani, Shin-Ichi +2 more
We investigated the properties of physical parameters during earthward flow burst (FB) events in the near-Earth magnetic tail. For the investigation, we used the measurements made by two of the Cluster satellites, C1 and C4, from 2001 to 2003 and selected FB events based on a set of strict criteria. First, while we confirmed the well-known fact th…