Longitudinal position of the western auroral electrojet and the density of interplanetary hydromagnetic clouds

Computer Science

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Auroral Electrojets, Interplanetary Medium, Longitude, Magnetic Storms, Magnetospheric Instability, Space Plasmas, Convective Flow, Magnetoactivity, Rarefied Plasmas

Scientific paper

A comparison of data of five interplanetary and magnetospheric flare disturbances shows that dense and rarefied interplanetary clouds generate magnetospheric storms from the western auroral electrojet situated at the morning and night meridians, respectively. This result can be explained by the presence of two branches of magnetospheric convection and their different dependences on the concentration of interplanetary plasma. Of decisive significance are deceleration (acceleration) of the main convection branch with increase (decrease) in density, the formation of slow (fast) convection waves in the reverse flow, their entrainment (lack of entrainment) by the earth's rotation, and the intensification (reduction) of convection on closed field lines with increase (decrease) in concentration.

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