Search Publications
Duskward displacement of plasmoids and reconnection in the near-Earth magnetotail
Miyashita, Yukinaga; Ieda, Akimasa
Magnetic reconnection in the near-Earth magnetotail is responsible for explosive release of energy during substorms and auroral breakups. This near-tail reconnection was previously assumed to occur around the midnight meridian, where earthward flows were typically observed. Based on observations of tailward-moving plasmoids, the Geotail spacecraft…
The pioneer Cluster mission: preparation of its legacy phase near re-entry
Escoubet, C. Philippe; Masson, Arnaud; Taylor, Matthew G. G. T. +5 more
The Cluster mission will always be the first ever multi-spacecraft mission mapping the Earth magnetosphere in three dimensions. Launched in 2000 and originally planned to operate for two years, it has been orbiting Earth for more than two solar cycles. Over the course of its lifetime, its data have enabled the scientific community to conduct pione…
Asymmetric deformation of the Earth's magnetosphere under low Alfvén Mach number solar wind: Observations and MHD simulation
Kasahara, Satoshi; Lavraud, Benoit; Saito, Yoshifumi +5 more
The density of the solar wind plasma near the Earth's magnetosphere sometimes decreases to only several per cent of the usual value, and such density extrema result in a significant reduction of the dynamic pressure and Alfvén Mach number (
Earth atmospheric loss through the plasma mantle and its dependence on solar wind parameters
Nilsson, Hans; Dandouras, Iannis; Slapak, Rikard +3 more
Atmospheric loss and ion outflow play an important role in the magnetospheric dynamics and in the evolution of the atmosphere on geological timescales—an evolution which is also dependent on the solar activity. In this paper, we investigate the total
Theory, modeling, and integrated studies in the Arase (ERG) project
Miyoshi, Yoshizumi; Saito, Shinji; Seki, Kanako +17 more
Understanding of underlying mechanisms of drastic variations of the near-Earth space (geospace) is one of the current focuses of the magnetospheric physics. The science target of the geospace research project Exploration of energization and Radiation in Geospace (ERG) is to understand the geospace variations with a focus on the relativistic electr…
Density response to magnetic field fluctuation in the foreshock plasma
Narita, Yasuhito; Hada, Tohru
The foreshock plasma exhibits large-amplitude disturbance in the plasma density and the magnetic field. The question of the density response to the magnetic field fluctuation is addressed and studied observationally and statistically using the in situ Cluster spacecraft data of the foreshock plasma. Three major findings are obtained. First, the de…
Erratum: Correction to: Grad-Shafranov reconstruction of magnetohydrostatic equilibria with nonisotropic plasma pressure: the theory
Teh, Wai-Leong
After publication of this article (Teh 2018), the author has noticed some error with the statement in the abstract and discussion sections.
Near-Earth plasma sheet boundary dynamics during substorm dipolarization
Strangeway, Robert J.; Plaschke, Ferdinand; Russell, Christopher T. +29 more
We report on the large-scale evolution of dipolarization in the near-Earth plasma sheet during an intense (AL ~ ‑1000 nT) substorm on August 10, 2016, when multiple spacecraft at radial distances between 4 and 15 RE were present in the night-side magnetosphere. This global dipolarization consisted of multiple short-timescale (a couple o…
Spectral moments for the analysis of frequency shift, broadening, and wavevector anisotropy in a turbulent flow
Narita, Y.
Turbulence represents essentially random fluctuations that evolve both spatially and temporally, and appear in various geophysical and space science applications. A spectral moment method is proposed to characterize the turbulence energy spectra in the wavevector and frequency domain in the lowest-order sense. The frequency shift velocity and the …
Electron hybrid code simulation of whistler-mode chorus generation with real parameters in the Earth's inner magnetosphere
Katoh, Yuto; Omura, Yoshiharu
We carry out a self-consistent simulation of the generation process of whistler-mode chorus by a spatially one-dimensional electron hybrid code, by assuming the magnetic field inhomogeneity corresponding to L = 4 of the dipole field. Chorus emissions with rising tones are reproduced in the simulation result, while the frequency range, sweep rate, …