Transformation of a magnetoacoustic wave into an Alfven wave during sudden commencements and sudden impulses

Details Transformation of a magnetoacoustic wave into an Alfven wave during sudden commencements and sudden impulses Transformation of a magnetoacoustic wave into an Alfven wave during sudden commencements and sudden impulses

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987ge%26ae..27..253l&link_type=abstract

Geomagnetizm i Aeronomiia (ISSN 0016-7940), vol. 27, Mar.-Apr. 1987, p. 253-257. In Russian.

Computer Science

Magnetoacoustic Waves, Magnetohydrodynamic Waves, Magnetospheric Instability, Plasma Oscillations, Space Plasmas, Sudden Ionospheric Disturbances, Cold Plasmas, Convective Flow, Energy Transfer, Plasma Cylinders, Plasma Dynamics, Toroidal Plasmas

Scientific paper

The mechanism for the excitation of toroidal Alfven oscillations during the compression or expansion of the magnetosphere is examined. The transformation of the original magnetoaoustic pulse into an Alfven wave occurs due to the disturbance of the azimuthal motion (convection) of the magnetospheric plasma. A comparison of calculations of the disturbance amplitudes with observations points to the sufficiently high efficiency of the proposed mechanism.

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