Magnetospheric cavity modes - Numerical model of a possible case

Details Magnetospheric cavity modes - Numerical model of a possible case Magnetospheric cavity modes - Numerical model of a possible case

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....94..309a&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 94, Jan. 1, 1989, p. 309-318.

Physics

12

Coupled Modes, Earth Magnetosphere, Magnetohydrodynamic Waves, Mathematical Models, Extremely Low Radio Frequencies, Geomagnetic Tail, Incoherent Scatter Radar, Magnetometers

Scientific paper

An attempt is made to test the cavity mode concept proposed by Crowley et al. (1987) by using the numerical time-dependent model of hydromagnetic wave coupling in a cylindrical magnetospheric geometry with parameters chosen to simulate the observed situation. By applying a numerical model of MHD coupling in the magnetosphere and choosing parameters to simulate the event, ground magnetic series are derived which are similar to the observed series, provided the plasma mass density gradient in the equatorial plane is relatively small. This is considered to be good supporting evidence for for a cavity mode drive. The results also demonstrate the structure of a highly dampled field line resonance driven by a compressional cavity mode.

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