Polar PWI Observations of Chorus Emissions and Electron Acceleration

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2720 Energetic Particles: Trapped, 2730 Magnetosphere: Inner, 2772 Plasma Waves And Instabilities (2471), 2774 Radiation Belts, 2788 Magnetic Storms And Substorms (7954)

Scientific paper

Using data from several geomagnetic storms in 1996-1997 when data from the Polar Plasma Wave Investigation (PWI) were available, we investigated the role of whistler mode chorus in accelerating outer radiation belt electrons. The storm time periods examined included the well-studied January 10-14, 1997 event. Possible correlations between chorus emissions observed by the Polar PWI and energetic electrons between 0.8 MeV and 6.4 MeV observed by the Polar Comprehensive Energetic Particle and Pitch Angle Distribution (CEPPAD) experiment will be presented. We will also discuss how the intensity of chorus emissions depends upon magnetic local time (MLT), magnetic latitude, L-shell, and the location of the plasmapause. We will also examine how chorus generation and the related electron acceleration processes depend upon the Kp and Dst geomagnetic activity indices. Results from detailed analysis of individual case studies and event statistics will be presented.

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