Mechanism for the excitation of reverse flow and electric field on the frontal side of the magnetosphere

Computer Science

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Atmospheric Electricity, Geomagnetism, Magnetohydrodynamic Flow, Magnetospheric Instability, Solar Terrestrial Interactions, Solar Wind, Flow Velocity, Magnetic Flux, Magnetopause, Reversed Flow

Scientific paper

An analysis is made of the motion of geomagnetic flux tubes at the magnetopause from the frontal point toward the magnetotail. It is shown that a decrease in the tangential component of the magnetic field with distance from the frontal point leads to the appearance of reverse plasma flow inside the magnetosphere with an increase in flow velocity with distance from the frontal point and to the corresponding generation of an electric-field component normal to the magnetopause. The flow velocity and the electric field are determined by two parameters at the point where the plasma stops: the Alfven velocity and the ratio of gas and magnetic pressures.

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