Effect of the ionospheric induction current on magnetohydrodynamic waves in the magnetosphere

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概要

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• The eigenvalue problem for coupled magnetohydrodynamic (MHD) waves interacting with the anisotropically conducting ionosphere has been solved numerically by using a rectangular box model for the magnetosphere, and the effect of the ionospheric induction current on the MHD waves in the magnetosphere has been examined. The initial results obtained are as follows : (1) The eigenperiod of the localized toroidal (shear Alfven mode) oscillation is effectively controlled by the height-integrated Hall conductivity. (2) A global monochromatic toroidal oscillation is excited by the fast magnetosonic wave via the ionospheric induction current.

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著者

• Itonaga Masahiro

  Computation Center Kyushu University

• Yoshikawa Akimasa

  Department Of Earth And Planetary Sciences Kyushu University

• Yoshikawa Akimasa

  Department Of Physics Kyushu University

• Kitamura Taiichi

  Department of Earth and Planetary Sciences, Kyushu University

• Kitamura Taiichi

  Department Of Earth And Planetary Sciences Kyushu University

関連論文

• A wave equation describing the generation of field-aligned current in the magnetosphere
• Ground magnetic perturbations associated with the standing toroidal mode oscillations in the magnetosphere-ionosphere system
• A significant mass density increase during a large magnetic storm in October 2003 obtained by ground-based ULF observations at L - 1.4
• Effect of the ionospheric induction current on magnetohydrodynamic waves in the magnetosphere
• A wave equation describing the generation of field-aligned current in the magnetosphere.

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