Nonlinear theory of low frequency geomagnetic pulsations

Details Nonlinear theory of low frequency geomagnetic pulsations Nonlinear theory of low frequency geomagnetic pulsations

Mar 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979p%26ss...27..249i&link_type=abstract

Planetary and Space Science, vol. 27, Mar. 1979, p. 249-254.

Physics

Geomagnetic Pulsations, Magnetohydrodynamic Waves, Magnetospheric Instability, Thermal Plasmas, Wave Excitation, Collisionless Plasmas, Ion Motion, Nonlinear Equations, Plasma-Particle Interactions, Wave Equations

Scientific paper

Nonlinear theory of Alfven wave generation in the magnetosphere is developed through an analysis that takes fast particles into account. It is shown that Alfven waves will accumulate in regions where the hot ion pressure is least, and the energy density of these waves may reach significant values in such regions. Nonlinear instability of Alfven waves may occur at small azimuthal wave numbers.

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