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Published on: May 25, 2021
Characteristic E-Region Plasma Signature of Magnetospheric Wave-Particle Interactions
Magnus F Ivarsen1, Yukinaga Miyashita2, Jean-Pierre St-Maurice3
1University of Oslo, Department of Physics, Oslo 0316, Norway.
Abstract:
Plasma waves in the magnetosphere scatter electrons, causing them to precipitate into Earth's atmosphere, imparting their temporal characteristics to diffuse auroras. In a case study of conjugate radar and satellite observations, we demonstrate a close and unprecedented association between enhanced electrostatic cyclotron harmonic wave activity in the magnetosphere and the appearance of meter-scale plasma turbulence a few seconds later in the lower ionosphere on nearby magnetic field lines. Such direct structuring of the ionosphere carries implications for our understanding of space weather.
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