Response of the dipole magnetosphere to pressure pulses

Details Response of the dipole magnetosphere to pressure pulses Response of the dipole magnetosphere to pressure pulses

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992georl..19..937l&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 19, no. 9, May 4, 1992, p. 937-940.

Physics

38

Earth Magnetosphere, Magnetic Dipoles, Pressure Effects, Pressure Pulses, Three Dimensional Models, Earth Ionosphere, Extremely Low Radio Frequencies, Magnetohydrodynamic Waves, Magnetopause

Scientific paper

The response of the magnetosphere to pressure pulses at the magnetopause has been studied using a three-dimensional model of ULF waves in a dipole geometry. Pressure pulses at the magnetosphere directly excite compressional waves, which then convert to shear mode Alfven waves due to inhomogeneity. The behavior of the system depends on the frequency of the source at the magnetopause, with vortex structure tending to form on field lines resonant with the source frequency. The perturbations between the vortices are skewed toward noon, in agreement with observations.

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