Current sheet
![The heliospheric current sheet results from the influence of the Sun's rotating magnetic field on the plasma in the interplanetary medium[1]](/uploads/202501/07/Heliospheric-current-sheet4841.gif)
![The evolution of a current sheet during a solar flare[2].](/uploads/202501/07/-Quad-flare.ogg4841.jpg)
A current sheet is an electric current that is confined to a surface, rather than being spread through a volume of space. Current sheets feature in magnetohydrodynamics (MHD), the study of the behavior of electrically conductive fluids: if there is an electric current through part of the volume of such a fluid, magnetic forces tend to expel it from the fluid, compressing the current into thin layers that pass through the volume.