Search Publications
Cluster vision of the magnetotail current sheet on a macroscale
Petrukovich, A. A.; Balogh, A.; Nakamura, R. +2 more
With Cluster 2001-2003 observations at ∼20 RE downtail we determine the cross-tail current sheet configuration via mapping of the neutral sheet positions and direct measurements of the sheet inclination. The warping effect tilts both flanks of the sheet up to 40° in the YZ GSM plane, while the gradual hinging effect tilts the sheet up t…
A universal characteristic of type II radio bursts
Kaiser, M. L.; Gopalswamy, N.; Aguilar-Rodriguez, E. +2 more
We present a study on the spectral properties of interplanetary type II radio bursts observed by the Radio and Plasma Wave (WAVES) experiment on board the Wind spacecraft. We investigated the relative bandwidth of the type II radio bursts observed by WAVES from 1997 up to 2003. We obtained three sets of events, based on the frequency domain of occ…
Three-dimensional estimates of the coronal electron density at times of extreme solar activity
Frazin, R. A.; Butala, M. D.; Kamalabadi, F.
This paper presents quantitative three-dimensional (3-D) reconstructions of the electron density (Ne) in the solar corona between 1.14 and 2.7 solar radii (R⊙) formed from polarized brightness (pB) measurements made by the Mauna Loa Solar Observatory Mark-IV (Mk4) K-coronameter at the time of the extreme solar events of Octob…
On the origin and configuration of the 20 March 2003 interplanetary shock and magnetic cloud at 1 AU
Richardson, I. G.; Lepping, R. P.; Martin, S. F. +1 more
On 20 March 2003, a forward shock was observed in the near-Earth solar wind, followed 8 hours later by an interplanetary magnetic cloud (IMC), in a configuration having several uncommon features: Both were parts of a 38-hour interval containing transient solar outflows that occurred in an extended high-speed stream from a Y-shaped extension of the…
Interplanetary consequences caused by the extremely intense solar activity during October-November 2003
Kojima, Masayoshi; Tokumaru, Munetoshi; Fujiki, Ken'ichi +2 more
We report interplanetary scintillation (IPS) measurements made by the 327 MHz four-station system of the Solar-Terrestrial Environment Laboratory of Nagoya University, during 21 October to 8 November 2003. In this period, solar activity increased greatly owing to the appearance of huge eruptive sunspots on the solar disk. Interplanetary (IP) distu…
Relation between the solar wind dynamic pressure at Voyager 2 and the energetic particle events at Voyager 1
Wang, C.; Richardson, J. D.; Stone, E. C. +2 more
Starting in 2001, Voyager 1 observed three events characterized by enhanced fluxes of energetic particles. These events suggest that Voyager 1 made a close approach to, or a crossing of, the termination shock. Although the plasma experiment on Voyager 1 is not providing useful data, plasma data from Voyager 2 may shed light on the plasma condition…
Modeling the solar energetic particle events in closed structures of interplanetary magnetic field
Torsti, J.; Kocharov, L.; Huttunen-Heikinmaa, K. +1 more
We undertook a numerical modeling of the solar energetic particle (SEP) event inside a loop-like magnetic cloud in the solar wind. Particles accelerated near the Sun are injected into the cloud of a previous coronal mass ejection (CME) that already has expanded through 1 AU. In the framework of focused transport, we perform Monte Carlo simulations…
Ionospheric signatures of plasma injections in the cusp triggered by solar wind pressure pulses
Cerisier, Jean-Claude; Marchaudon, AuréLie; Bosqued, Jean-Michel +7 more
We describe coordinated observations made on 14 July 2001 simultaneously in the midaltitude cusp by Cluster and at the cusp's ionospheric magnetic footprint by Super Dual Auroral Radar Network (SuperDARN) and Imager for Magnetopause-to-Aurora Global Exploration (IMAGE) during a period of three successive solar wind dynamic pressure pulses. In asso…
Energetic particle observations from the Ulysses COSPIN instruments obtained during the October-November 2003 events
Dalla, S.; Kunow, H.; Heber, B. +7 more
We report comprehensive observations of solar energetic particle intensities at energies from 0.3 to >100 MeV made by the suite of six Ulysses COSPIN energetic charged particle instruments on the Ulysses spacecraft during the period of intense solar activity in October/November 2003. We also discuss observations of particle anisotropies in sele…
Whistlers observed by the Cluster spacecraft outside the plasmasphere
Gurnett, D. A.; Pickett, J. S.; Inan, U. S. +4 more
Lightning generated whistlers are ubiquitous within the plasmasphere at both high and low altitudes, and these waves propagate efficiently in both ducted and nonducted modes. On the other hand, in the magnetospheric region outside the plasmasphere, lightning-generated whistlers are commonly observed at low altitudes (up to ∼6000 km) but only rarel…