Search Publications
Two-Dimensional gcPIC Simulation of Rising-Tone Chorus Waves in a Dipole Magnetic Field
Wang, Xueyi; Wang, Shui; Lu, Quanming +4 more
Rising-tone chorus waves have already been successfully produced in a mirror magnetic field with the use of one- and two-dimensional particle-in-cell (PIC) simulations. However, in reality, the background magnetic field in the inner Earth's magnetosphere is a dipole magnetic field, unlike symmetric mirror fields. In this paper, with the two-dimens…
Universality of Lower Hybrid Waves at Earth's Magnetopause
Lavraud, B.; Génot, V.; André, M. +15 more
Waves around the lower hybrid frequency are frequently observed at Earth's magnetopause and readily reach very large amplitudes. Determining the properties of lower hybrid waves is crucial because they are thought to contribute to electron and ion heating, cross-field particle diffusion, anomalous resistivity, and energy transfer between electrons…
Global Empirical Picture of Magnetospheric Substorms Inferred From Multimission Magnetometer Data
Sitnov, M. I.; Tsyganenko, N. A.; Stephens, G. K. +4 more
Magnetospheric substorms represent key explosive processes in the interaction of the Earth's magnetosphere with the solar wind, and their understanding and modeling are critical for space weather forecasting. During substorms, the magnetic field on the nightside is first stretched in the antisunward direction and then it rapidly contracts earthwar…
Nighttime Magnetic Perturbation Events Observed in Arctic Canada: 2. Multiple-Instrument Observations
Russell, C. T.; Kistler, L. M.; Fazakerley, A. +14 more
The rapid changes of magnetic fields associated with nighttime magnetic perturbations with amplitudes |ΔB| of hundreds of nanoteslas and 5- to 10-min periods can induce bursts of geomagnetically induced currents that can harm technological systems. This paper presents three cases of intervals of intense and complex nighttime magnetic perturbations…
Signatures of Nonideal Plasma Evolution During Substorms Obtained by Mining Multimission Magnetometer Data
Merkin, V. G.; Sitnov, M. I.; Genestreti, K. J. +5 more
Substorm-type evolution of the Earth's magnetosphere is investigated by mining more than two decades (1995-2017) of spaceborne magnetometer data from multiple missions including the first two years (2016-2017) of the Magnetospheric MultiScale mission. This investigation reveals interesting features of plasma evolution distinct from ideal magnetohy…
Properties of Magnetic Reconnection and FTEs on the Dayside Magnetopause With and Without Positive IMF Bx Component During Southward IMF
Kilpua, E. K. J.; Fear, R. C.; Palmroth, M. +11 more
This paper describes properties and behavior of magnetic reconnection and flux transfer events (FTEs) on the dayside magnetopause using the global hybrid-Vlasov code Vlasiator. We investigate two simulation runs with and without a sunward (positive) Bx component of the interplanetary magnetic field (IMF) when the IMF is southward. The r…
Characteristics of the Flank Magnetopause: THEMIS Observations
Haaland, S.; Runov, A.; Angelopoulos, V. +1 more
The terrestrial magnetopause is the boundary that shields the Earth's magnetosphere on one side from the shocked solar wind and its embedded interplanetary magnetic field on the other side. In this paper, we show observations from two of the Time History of Events and Macroscales Interactions during Substorms (THEMIS) satellites, comparing dayside…
An Automatic Detection Algorithm Applied to Fast Magnetosonic Waves With Observations of the Van Allen Probes
Yuan, Zhigang; Yao, Fei; Yu, Xiongdong +2 more
Fast magnetosonic (MS) waves can play an important role in the evolution of the inner magnetosphere. However, there is still not an effective method to quantitatively identify such waves for observations of the Van Allen Probes reasonably. In this paper, we used Van Allen Probes data from 18 September 2012 to 30 September 2014 to find a more compr…
Statistical Survey of the Terrestrial Bow Shock Observed by the Cluster Spacecraft
Maksimovic, M.; Santolik, O.; Němec, F. +6 more
The terrestrial bow shock provides us with a unique opportunity to extensively investigate properties of collisionless shocks using in situ measurements under a wide range of upstream conditions. Here we report a statistical study of 529 terrestrial bow shock crossings observed between years 2001 and 2013 by the four Cluster spacecraft. By applyin…
Numerical Algorithm for Detecting Ion Diffusion Regions in the Geomagnetic Tail With Applications to MMS Tail Season 1 May to 30 September 2017
Farrugia, C. J.; Torbert, R. B.; Rogers, A. J.
We present a numerical algorithm to identify ion diffusion regions (IDRs) in the geomagnetic tail and test its applicability. We use five criteria applied in three stages. (i) correlated reversals (within 90 s) of Vx and Bz (at least 2 nT about 0; geocentric solar magnetospheric coordinates); (ii) detection of Hall electric a…