Physics
Scientific paper
Jan 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....94..252b&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 94, Jan. 1, 1989, p. 252-260. Research supported by NASA.
Physics
25
Birkeland Currents, Current Sheets, Field Aligned Currents, Geomagnetic Tail, Magnetic Field Configurations, Plasma Equilibrium, Earth Magnetosphere, Self Consistent Fields, Solar Terrestrial Interactions, Tearing Modes (Plasmas), Three Dimensional Models
Scientific paper
Using the magnetotail equilibrium theory and a solution method outlined by Birn (1987), self-consistent three-dimensional models were constructed for the quiet average magnetotail beyond about 20 RE distance but earthward of a potential distant neutral line, which take into account the decrease of the tail flaring with distance. It is found that this effect is coupled with the presence of magnetic shear and thus with field-aligned electric currents. These currents have the signature of region 1 currents, toward the earth on the dawnside and away on the duskside, and contribute about 500,000 A to the total Birkeland current.
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