shearAlfvén
shearAlfvén is a type of magnetohydrodynamic (MHD) wave that propagates in a magnetized plasma. These waves are characterized by the displacement of plasma perpendicular to both the ambient magnetic field and the direction of wave propagation. The restoring force for shearAlfvén waves comes from the tension in the magnetic field lines. When a portion of the plasma is displaced perpendicular to the magnetic field, the magnetic field lines are bent, creating a magnetic tension that pulls the plasma back towards its equilibrium position. This oscillation propagates along the magnetic field lines.
The speed at which shearAlfvén waves travel is known as the Alfvén speed. This speed is dependent