Comment on “Tail Reconnection Triggering Substorm Onset”
TLDR
Evidence is provided that near-Earth current disruption, occurring before the conventional tail reconnection signatures, triggered the onset of a magnetospheric substorm, and the observed auroral intensification and tail reconnections are not causally linked.Abstract:
Angelopoulos et al. (Research Articles, 15 August 2008, p. 931) reported that magnetic reconnection in Earth’s magnetotail triggered the onset of a magnetospheric substorm. We provide evidence that (i) near-Earth current disruption, occurring before the conventional tail reconnection signatures, triggered the onset; (ii) the observed auroral intensification and tail reconnection are not causally linked; and (iii) the onset they identified is a continuation of earlier substorm activities.read more
Citations
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Recent advances in understanding substorm dynamics
TL;DR: In this article, a review of recent major advances enabled by modern multi-point space-based and ground-based platforms is presented, highlighting progress in two areas: (1) substorm onset timing and evidence for current sheet preconditioning and destabilization and (2) fast flows and dipolarizations.
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The substorm current wedge in MHD simulations
J. Birn,J. Birn,Michael Hesse +2 more
TL;DR: In this article, the build-up and evolution of the substorm current wedge (SCW) and its association with plasma flows from the tail were investigated using MHD simulations of magnetotail dynamics.
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Investigation of storm time magnetotail and ion injection using three-dimensional global hybrid simulation
TL;DR: In this paper, a 3D global hybrid simulation model of the near-Earth magnetotail associated with substorms during a period of extended southward interplanetary magnetic field was studied using a three-dimensional (3D) global hybrid model that includes both the dayside and nightside magnetosphere, with physics from the ion kinetic to the global Alfvenic convection scales.
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Magnetic reconnection, buoyancy, and flapping motions in magnetotail explosions
M. I. Sitnov,Viacheslav Merkin,Marc Swisdak,Tetsuo Motoba,Natalia Buzulukova,Natalia Buzulukova,Thomas E. Moore,Barry Mauk,Shinichi Ohtani +8 more
TL;DR: In this paper, the authors used massively parallel 3D fully kinetic simulations with open boundaries to show that sufficiently far from the planet explosive processes in the tail are dominated by reconnection motions, which occur in the form of spontaneously generated dipolarization fronts accompanied by changes in magnetic topology.
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Large-scale structure and dynamics of the magnetotails of Mercury, Earth, Jupiter and Saturn
Caitriona M. Jackman,Caitriona M. Jackman,Caitriona M. Jackman,Chris S. Arridge,Chris S. Arridge,Nicolas André,Nicolas André,Fran Bagenal,Joachim Birn,Joachim Birn,Mervyn P. Freeman,Xianzhe Jia,A. Kidder,Steve Milan,Aikaterini Radioti,James A. Slavin,Marissa F. Vogt,Marissa F. Vogt,Martin Volwerk,Andrew Walsh +19 more
TL;DR: In this paper, the magnetotails of the four known planets with an internal magnetic field, as part of their interaction with the solar wind, have been studied and several spacecraft have been visited over the years.
References
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Journal ArticleDOI
Tail reconnection triggering substorm onset.
Vassilis Angelopoulos,James P. McFadden,Davin Larson,C. W. Carlson,Stephen B. Mende,Harald U. Frey,Tai Phan,David G. Sibeck,Karl-Heinz Glassmeier,Uli Auster,Eric Donovan,Ian R. Mann,I. Jonathan Rae,Christopher T. Russell,Andrei Runov,Xu-Zhi Zhou,Larry Kepko +16 more
TL;DR: Results demonstrate that substorms are likely initiated by tail reconnection, and are reported on simultaneous measurements in the magnetotail at multiple distances, at the time of substorm onset.
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Plasma sheet instability related to the westward traveling surge
Aurélien Roux,S. Perraut,Patrick Robert,A. Morane,Arne Pedersen,A. Korth,G. Kremser,B. Aparicio,D. Rodgers,R. J. Pellinen +9 more
TL;DR: In this article, a detailed analysis of an isolated dispersionless substorm is performed on the basis of field and particle data collected in situ by the geostationary satellite GEOS 2 and of data from ground-based instruments installed close to the GEOS2 magnetic footprint.
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A synthesis of magnetospheric substorm models
TL;DR: In this article, the authors construct a coherent description of substorm development by extracting some important components from these existing models, including the ionospheric influence on substorm expansion onset, current disruptions leading to convection surges and tailward propagating rarefaction waves, wave-induced precipitation, local time expansion of the disturbance region via velocity-shear-related instabilities, plasma sheet heating by resonant absorption of hydromagnetic waves, and the formation of magnetic reconnection domains.
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The THEMIS Array of Ground-based Observatories for the Study of Auroral Substorms
Stephen B. Mende,S. E. Harris,Harald U. Frey,Vassilis Angelopoulos,Christopher T. Russell,Eric Donovan,Brian Jackel,M. Greffen,Laura Peticolas +8 more
TL;DR: The NASA Time History of Events and Macroscale Interactions during Substorms (THEMIS) project as mentioned in this paper is intended to investigate magnetospheric substorm phenomena by using five in-situ satellites and ground-based all-sky imagers and magnetometers.
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Characteristics of the development of the westward electrojet during the expansive phase of magnetospheric substorms
Ronald G. Wiens,Gordon Rostoker +1 more
TL;DR: In this paper, the authors used high-, mid-, and low-latitude magnetograms to show that the westward expansion of the substorm westward electrojet is not continuous but takes place as a series of discrete steps or jumps.