Correlated observations of two auroral substorms from an aircraft and from a Vela satellite

Details Correlated observations of two auroral substorms from an aircraft and from a Vela satellite Correlated observations of two auroral substorms from an aircraft and from a Vela satellite

Jun 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jgr....81.2709w&link_type=abstract

Journal of Geophysical Research, vol. 81, June 1, 1976, p. 2709-2718. DOD-ERDA-supported research.

Other

Auroral Electrojets, Geomagnetic Tail, Plasma Layers, Polar Substorms, Satellite Observation, Vela Satellites, Airborne Equipment, Auroral Zones, Electron Energy, Satellite-Borne Instruments

Scientific paper

A jet aircraft, flying from Goose Bay, Labrador, to Fairbanks, Alaska, made auroral observations at nearly constant magnetic local time in the auroral zone while a Vela satellite passed through the plasma sheet at 18 earth radii at nearly the same magnetic local time. Comparisons of data from the two locations provide further confirmation of the 'poleward leap' of the auroral electrojet which occurs in a late phase of an auroral substorm and is associated with a rapid tailward motion of an X-type neutral line in the magnetotail. The poleward leap is a distinctive feature of substorm evolution and is not simply the superposition of a new substorm on the recovery phase of a preceding substorm. It probably marks the sudden transition of the magnetotail from one quasi-stable configuration to another more stable one. Onset of a substorm expansive phase brings about a change of tail magnetic field from a configuration that is extremely taillike to one that is much less taillike.

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