Journal ArticleDOI
Deformation and evolution of solar wind discontinuities through their interactions with the Earth's bow shock
K. Keika,K. Keika,Rumi Nakamura,Wolfgang Baumjohann,Vassilis Angelopoulos,K. Kabin,Karl-Heinz Glassmeier,David G. Sibeck,Werner Magnes,H. U. Auster,Karl-Heinz Fornacon,J. P. McFadden,C. W. Carlson,E. A. Lucek,Chris Carr,Iannis Dandouras,Robert Rankin +16 more
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In this paper, the authors examined the interaction of solar wind discontinuities with the Earth's bow shock, using multipoint observations in the magnetosheath by Time History of Events and Macroscale Interactions during Substorms (THEMIS), Cluster, and Double Star TC1.Abstract:
[1] The present study examines the interaction of solar wind discontinuities with the Earth's bow shock, using multipoint observations in the magnetosheath by Time History of Events and Macroscale Interactions During Substorms (THEMIS), Cluster, and Double Star TC1 We focus on the deformation and evolution of two discontinuities observed on 21 June 2007, one of which involves a density increase and a magnetic field decrease, while the other is accompanied by a density decrease and a magnetic field increase In the magnetosheath, the discontinuities are deformed into a concave shape; that is, the normal is inclined toward dusk (dawn) on the dawnside (duskside) The density-increase (-decrease) discontinuity is being compressed (expanded) as it propagates in the magnetosheath We conclude that the compression (expansion) is due to antisunward (sunward) motion of the bow shock which is initiated or enhanced by the impact of the discontinuity on the bow shock The steepening of Bz reversal followed by an overshoot of the total magnetic field, which appears at the trailing edge of the density-decrease discontinuity, is also discussedread more
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Journal ArticleDOI
Substorm expansion triggered by a sudden impulse front propagating from the dayside magnetopause
K. Keika,Rumi Nakamura,Wolfgang Baumjohann,Vassilis Angelopoulos,Peter Chi,Karl-Heinz Glassmeier,Karl-Heinz Glassmeier,Matthew Fillingim,Werner Magnes,H. U. Auster,Karl-Heinz Fornacon,Geoffrey D. Reeves,Kiyohumi Yumoto,E. A. Lucek,Chris Carr,Iannis Dandouras +15 more
TL;DR: In this article, the authors examined a substorm expansion on 21 June 2007, which occurred <2 min after a solar wind discontinuity accompanied by a dynamic pressure (Pd) increase impinged on the magnetopause.
Journal ArticleDOI
Collision of an interplanetary shock wave with the Earth’s bow shock. Hydrodynamic parameters and magnetic field
A. S. Korolev,E. A. Pushkar +1 more
TL;DR: In this article, the authors constructed the interaction pattern in the quasi-steady state formulation as a mosaic of exact solutions, obtained by means of a computer, to the Riemann problem of breakdown of a discontinuity between the states downstream of the impinging wave and the bow shock on the traveling line of intersection of their fronts.
Journal ArticleDOI
The magnetic hole as plasma inhomogeneity in the solar wind and related interplanetary medium perturbations
S. A. Grib,S. N. Leora +1 more
TL;DR: In this paper, the magnetic hole in the scope of the MHD theory is considered a plasma inhomogeneity bounded by two tangential discontinuities: the front and rear boundaries.
Journal ArticleDOI
Solar Wind Discontinuity Interaction with the Bow Shock: Current Density Growth and Dawn-Dusk Asymmetry
TL;DR: In this article, the authors investigated the transformation of discontinuities due to the bow shock crossing and showed that solar wind discontinuity transformation at the bow-shock crossing can alter their interaction with the Earth magnetosphere.
Journal ArticleDOI
Evolution of the current system during solar wind pressure pulses based on aurora and magnetometer observations
Yukitoshi Nishimura,Takashi Kikuchi,Takashi Kikuchi,Yusuke Ebihara,Akimasa Yoshikawa,Shun Imajo,Wen Li,Hisashi Utada +7 more
TL;DR: In this article, the authors investigated the evolution of ionospheric currents during sudden commencements using a ground magnetometer network in conjunction with an all-sky imager, which has the advantage of locating field-aligned currents much more accurately than ground magnetometers.
References
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Journal ArticleDOI
The THEMIS Mission
TL;DR: The Time History of Events and Macroscale Interactions during Substorms (THEMIS) mission is the fifth NASA Medium-class Explorer (MIDEX), launched on February 17, 2007 to determine the trigger and large-scale evolution of substorms as discussed by the authors.
Journal ArticleDOI
Regular Article: A Solution-Adaptive Upwind Scheme for Ideal Magnetohydrodynamics
TL;DR: In this article, the authors present a computational scheme for compressible magnetohydrodynamics (MHD) based on the same elements that make up many modern compressible gas dynamics codes: high-resolution upwinding based on an approximate Riemann solver for MHD and limited reconstruction; an optimally smoothing multi-stage time-stepping scheme; and solution-adaptive refinement and coarsening.
Journal ArticleDOI
The WIND magnetic field investigation
R. P. Lepping,M. H. Acũna,L. F. Burlaga,William M. Farrell,James A. Slavin,K. H. Schatten,F. Mariani,Norman F. Ness,Fritz M. Neubauer,Y. C. Whang,J. B. Byrnes,R. S. Kennon,P. V. Panetta,John Scheifele,E. M. Worley +14 more
TL;DR: The magnetic field experiment on WIND will provide data for studies of a broad range of scales of structures and fluctuation characteristics of the interplanetary magnetic field throughout the mission, and, where appropriate, relate them to the statics and dynamics of the magnetosphere.
Journal ArticleDOI
The Cluster Magnetic Field Investigation: overview of in-flight performance and initial results
A. Balogh,Chris Carr,Mario H. Acuña,M. W. Dunlop,T. Beek,Patrick Brown,Karl-Heinz Fornacon,E. Georgescu,Karl-Heinz Glassmeier,J. Harris,G. Musmann,T. Oddy,Konrad Schwingenschuh +12 more
TL;DR: In this paper, the authors present an overview of the instrumentation used to measure the magnetic field on the four Cluster spacecraft and an overview the performance of the operational modes used in flight.
Journal ArticleDOI
First multispacecraft ion measurements in and near the Earth's magnetosphere with the identical Cluster ion spectrometry (CIS) experiment
H. Rème,C. Aoustin,J. M. Bosqued,Iannis Dandouras,Benoit Lavraud,Jean-André Sauvaud,A. Barthe,J. Bouyssou,T. Camus,O. Coeur-Joly,A. Cros,J. Cuvilo,F. Ducay,Y. Garbarowitz,J. L. Medale,Emmanuel Penou,H. Perrier,D. Romefort,Jean-Noël Rouzaud,Claire Vallat,D. Alcaydé,C. Jacquey,Christian Mazelle,Claude d’Uston,Eberhard Möbius,L. M. Kistler,K. Crocker,M. Granoff,C. G. Mouikis,M. Popecki,M. Vosbury,Berndt Klecker,D. Hovestadt,Harald Kucharek,E. Kuenneth,G. Paschmann,Manfred Scholer,N. Sckopke,E. Seidenschwang,C. W. Carlson,D. W. Curtis,C. Ingraham,Robert P. Lin,James P. McFadden,George K. Parks,Tai Phan,Vittorio Formisano,Ermanno Amata,M. B. Bavassano-Cattaneo,P. Baldetti,Roberto Bruno,G. Chionchio,A. M. Di Lellis,Maria Federica Marcucci,G. Pallocchia,A. Korth,P. W. Daly,B. Graeve,H. Rosenbauer,Vytenis M. Vasyliunas,Matthew D. McCarthy,M. Wilber,Lars Eliasson,Rickard Lundin,S. Olsen,E. G. Shelley,Stephen A. Fuselier,A. G. Ghielmetti,W. Lennartsson,C. P. Escoubet,Hans Balsiger,Reiner Friedel,J.-B. Cao,R. A. Kovrazhkin,I. Papamastorakis,R. Pellat,J. D. Scudder,Bengt U. Ö. Sonnerup +77 more
TL;DR: The Cluster Ion Spectrometry (CIS) experiment as discussed by the authors measured the full, three-dimensional ion distribution of the major magnetospheric ions (H+, He+, He++, and O+) from the thermal energies to about 40 keV/e.
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H. U. Auster,Karl-Heinz Glassmeier,Werner Magnes,O. Aydogar,Wolfgang Baumjohann,D. Constantinescu,David Fischer,Karl-Heinz Fornacon,E. Georgescu,Peter Harvey,Olaf Hillenmaier,R. Kroth,Michael Ludlam,Yasuhito Narita,Rumi Nakamura,K. Okrafka,Ferdinand Plaschke,Ingo Richter,H. Schwarzl,B. Stoll,Aris Valavanoglou,M. Wiedemann +21 more