Plasmasheet magnetic fields in the distant tail

Details Plasmasheet magnetic fields in the distant tail Plasmasheet magnetic fields in the distant tail

Oct 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984georl..11.1062t&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 11, Oct. 1984, p. 1062-1065. NASA-supported research.

Physics

25

Geomagnetic Tail, International Sun Earth Explorer 3, Kp Index, Magnetic Field Configurations, Magnetospheric Instability, Space Plasmas, Magnetic Flux, Plasma Turbulence, Radial Distribution

Scientific paper

Data from two deep passes of ISEE-3 through the earth's magnetotail are used to discuss the evolution of the plasmasheet magnetic field as a function of radial distance and geomagnetic activity (Kp). Attention is focused on plasmasheet intervals lasting at least 10 min as recorded during passes lasting 3 and 5 mos with apogees of 221 and 238 earth radii (ER). The dependencies of the By and Bz components on Kp were minimal, although Bz displayed a radial dependence. No relationship was observed between By and Bz. The Bz component changed from a northward orientation at 60-100 ER to a N-S dependence at 200-238 ER. Variations in field measurements indicated turbulence throughout the plasmasheet, also independent of Kp. The data support formation of a plasmoid during periods of high Kp, and can serve as limiting conditions for developing more accurate magnetotail models.

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