Magnetospheric ULF wave coupling in the dipole model - The impulsive excitation

Details Magnetospheric ULF wave coupling in the dipole model - The impulsive excitation Magnetospheric ULF wave coupling in the dipole model - The impulsive excitation

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....9417097l&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 94, Dec. 1, 1989, p. 17097-17103.

Physics

127

Compression Waves, Earth Magnetosphere, Extremely Low Radio Frequencies, Magnetic Dipoles, Magnetohydrodynamic Waves, Transverse Waves, Computer Programs, Frequency Distribution, Inhomogeneity, Resonant Frequencies, Spatial Distribution

Scientific paper

The coupling of compressional and transverse hydromagnetic waves is studied in the cold and inhomogeneous outer magnetosphere. A set of global modes is found whose spatial structure is complicated due to the inhomogeneity of the dipole geometry. These global modes are strongly coupled to field line resonances when the global mode frequency is harmonically matched to the toroidal resonant frequency. The coupling of the two modes results in relatively large-amplitude oscillations along the resonant field lines.

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