Evolution of field-aligned current in the meridional plane during substorm: multipoint observations from satellites and ground stations
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چکیده
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Cross-tail current evolution during substorm dipolarization
We examine evolution of the cross-tail current during substorm current disruption/dipolarization using observations from two satellites in the near-Earth magnetotail at the downtail distances of 8–9RE. By choosing times when these two satellites are separated, mainly in the north–south distance in the tail current sheet, precise determination of current density in the layer embedded between the...
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Magnetic field configuration and field-aligned acceleration of energetic ions during substorm onsets
In this paper, we present an interpretation of the observed field-aligned acceleration events measured by GEOS-2 near the night-side synchronous orbit at substorm onsets (Chen et al., 2000). We show that field-aligned acceleration of ions (with pitch angle asymmetry) is closely related to strong short-lived electric fields in the Ey direction. The acceleration is associated with either rapid di...
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ژورنال
عنوان ژورنال: Earth, Planets and Space
سال: 2020
ISSN: 1880-5981
DOI: 10.1186/s40623-020-01182-6