abstract:A magnetosonic wave (also magnetoacoustic wave) is a longitudinal waveThe wave is longitudinal in the perturbation of the fluid velocity, although the perturbation of the magnetic field is transverse. See Schmidt, Physics of High Temperature Plasmas, p.
A slowshock-fastmagnetosonic wavesystemformednearthe sunevolves into a hybridshockwithan intermediate shock as its necessarycomponentwhilepropagatingoutward.