Results 151 to 160 of about 930 (170)

Magnetotail origins of auroral Alfvénic power

Journal of Geophysical Research: Space Physics, 2012
The generation of Alfvénic Poynting flux in the central plasma sheet and its polar distribution at low altitude are studied using three dimensional global simulations of the solar wind‐magnetosphere‐ionosphere interaction. A 24‐hour event simulation (4–5 Feb 2004) driven by solar wind and interplanetary magnetic field data reproduces the global ...
Wiltberger, M., Brambles, O., Damiano, P., Lyon, J., Zhang, B., Lotko, W.   +5 more
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Dynamics of the Jovian magnetotail

2006
The Jupiter orbiting spacecraft Galileo has provided evidence that the Jovian magnetotail is subject to a periodic process with a typical timescale of several days by which the Jovian system is presumably releasing its excess iogenic mass. This process is analyzed using data returned from the Energetic Particles Detector (EPD), the magnetometer and ...
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Reconnection in Earth's magnetotail

Science, 2018
Plasma Astrophysics Magnetic fields in plasmas can rapidly rearrange themselves in a process known as magnetic reconnection, which releases energy and accelerates particles. Torbert et al. used the Magnetospheric Multiscale (MMS) mission to probe a reconnection event in Earth's magnetotail—the region of plasma downstream from the planet as it moves ...
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The magnetotail magnetic field

Journal of Geophysical Research: Space Physics, 1979
The magnetic vector potential for points throughout the magnetosphere has been obtained by integrating over a model magnetotail current system. Parameterized functions of x, y, z have then been fit to the potential at these points. The curl of the resultant vector potential function matches the computed magnetic field closely.
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Magnetotail dynamics under isobaric constraints

Journal of Geophysical Research: Space Physics, 1994
Using linear theory and nonlinear MHD simulations, we investigate the resistive and ideal MHD stability of two‐dimensional plasma configurations under the isobaric constraint dP/dt = 0, which in ideal MHD is equivalent to conserving the pressure function P = P(A), where A denotes the magnetic flux. This constraint is satisfied for incompressible modes,
Joachim Birn, Karl Schindler, Lutz Janicke, Michael Hesse   +3 more
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Magnetotail energy storage and the variability of the magnetotail current sheet

1984
The antiparallel field configuration in the earth magnetotail is a prime location to search for the important astrophysical process known as magnetic reconnection. The magnetic evidence that reconnection occurs in the earth's magnetotail is that the energy of the tail invariably decreases at the time of global substorm onsets, and that an increased ...
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Macroinstabilities of the Magnetotail

1979
There is evidence supporting the view that substorms are initiated by an instability. The present paper starts out from the assumption that the unstable process is an instability of the magnetotail. The stability theory of the tail is summarized and the major predictions are described. It is argued that the spontaneous reconnection (tearing) picture is
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Implosion in the Magnetotail

1978
Undoubtedly, the most lively manifestation of the dynamic nature of the earth’s magnetosphere is the auroral break-up. The magnetospheric phenomena that are associated with this explosive release of energy have been the aim of intense research efforts in recent years, and the term magnetospheric substorm has been introduced to designate these phenomena
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Magnetotail Deflation: Geotail Observations

2005
Abstract A sudden decrease in the total pressure in the mid-magnetotail associated with a substorm was designated as magnetotail deflation by Nakai and Kamide (2003). Utilizing UVI auroral image data from Polar and magnetic field and particle data from Geotail, a typical example of the magnetotail deflation is examined in detail.
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Ion dynamics during magnetotail reconnection

Advances in Space Research, 2000
Abstract Due to the breakdown of particle adiabaticity in the tail current sheet with its highly curved magnetic field the application of fluid equations is questionable. Therefore a detailed understanding of magnetotail dynamics during reconnection requires that the particle dynamics is resolved on length scales comparable to the ion inertia length ...
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