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Detailed Reference Information |
Jacquey, C., Sauvaud, J.A., Dandouras, J. and Korth, A. (1993). Tailward propagating cross-tail current disruption and dynamics of near-Earth Tail: A multi-point measurement analysis. Geophysical Research Letters 20: doi: 10.1029/93GL00072. issn: 0094-8276. |
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Plasma and magnetic field data taken simultaneously in the near-Earth plasma sheet (6.6--13 RE) aboard three satellites, GEOS-2, ISEE-1, and ISEE-2, are used to infer directly the location and tailward propagation velocity of the partial cross-tail current disruption associated with a well-defined substorm. This study shows that the disruption starts at 6--9 RE and propagates down the tail with a velocity of the order of 150 to 250 km/s over tens of earth radii during the substorm expansion phase. Moreover, magnetic variations measured aboard GEOS-2 suggest that the partial current disruption also propagates longitudinally. After a time delay of about 2 minutes after the disruption onset, an injection front of accelerated particles is measured at geostationary orbit. This time delay is interpreted as indicating that the front propagates earthward with a velocity of the order of 20 to 160 km/s and also eastward. The overall post-onset magnetic signatures measured at geostationary orbit are shown to be mainly due to an expansion (thickening) of the current sheet in the close vicinity of GEOS-2 during the expansion phase. ¿ American Geophysical Union 1993 |
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BACKGROUND DATA FILES |
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Abstract |
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Keywords
Magnetospheric Physics, Storms and substorms, Magnetospheric Physics, Magnetospheric configuration and dynamics, Magnetospheric Physics, Current systems, Magnetospheric Physics, Energetic particles, precipitating |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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