A region of intense plasma wave turbulence on auroral field lines

Physics

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Auroral Zones, Electromagnetic Noise, Explorer 43 Satellite, Hawkeye Satellites, Plasma Turbulence, Plasma Waves, Electric Field Strength, Electrostatic Waves, Geomagnetic Tail, Hiss, Whistlers

Scientific paper

Plasma wave measurements from the Hawkeye 1 and Imp 6 satellites show that a region of intense plasma wave turbulence occurs on high-latitude auroral field lines at altitudes ranging from a few thousand kilometers in the ionosphere to greater than 40 R-E in the distant magnetotail. Two distinct components are evident in the spectrum of this turbulence: (1) an intense quasi-electrostatic component called broadband electrostatic noise and (2) a weak whistler mode electromagnetic component called magnetic noise bursts. It is suggested that the plasma wave turbulence occurs on magnetic field lines which connect with regions of intense inverted V electron precipitation at low altitudes and with regions of intense earthward plasma flow in the distant magnetotail.

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