Initial parallel-propagating Alfvén-α-cyclotron wave spectra – solution of the coupled set of cold quasi-neutral multifluid plasma and the nonrelativistic Maxwell equations. Top panel: the solution for nondrifting plasma. Middle panel: the solution for relative drift speed V_αp = 0.2V_A. Bottom panel: the solution for the special case of a relative drift speed of V_αp = 0.5V_A. The initial wave spectra was selected from the Alfvén-α-cyclotron branch, and its [ ω₀,k₀ ] range is shown as a solid brown line.