National Institute of Polar Research
National Institute of Polar Research
National Institute of Polar Research
Geophysics Research Laboratory, University of Tokyo
Geophysics Research Laboratory, University of Tokyo
Preliminary analyses of the MAGSAT magnetic field data have been carried out. In high latitudes the signatures of field-aligned currents are clearly recognized to have the following characteristics : (1) the persistent basic pattern of current flow (so-called Regions 1 and 2), with the dominate in intensity of Region 1 (pole-side) current over Region 2 (equator-side) current, and with greater variability of Region 2 current presumably depending on the substorm activity; (2) spatial latitudinal extent of field-aligned current being about 3°for Region 1 and about 5° for Region 2,wider than previously expected, and unusual reverse polarity of current flow direction; and (3) apparent dawn-dusk asymmetry in the field-aligned current intensity between the north and south polar regions.
MAGSAT衛星で観測された沿磁力線電流の特性
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KJ00000139496
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概要
