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Magnetospheric source region of auroral finger-like structures observed by the RBSP-A satellite

Auroral finger-like structures appear equatorward of the auroral oval in the diffuse auroral region and contribute to the auroral fragmentation into patches. A previous report of the first conjugate observation of auroral finger-like structures using a THEMIS GBO camera and the THEMIS-E satellite at a radial distance of \~8 RE showed anti-phase oscillations of magnetic and plasma pressures in the dawnside plasma sheet. In the present study, we report another simultaneous observation of auroral finger-like structures at Gilla ...

Nishi, Katsuki; Shiokawa, Kazuo; Spence, Harlan;

YEAR: 2018     DOI: 10.1029/2018JA025480

Auroral finger-like structure; inner magnetosphere; pressure-driven instability; Van Allen Probes