Left: meridional cut of the normalized kinetic energy of a D mode with eigenfrequency ω_p ≈ 1.66 obtained with E = 10^-8, η = 0.10, and conical differential rotation ε = 0.30. The attractor of characteristics is again overplotted by the thick white curve. Right: meridional cut of the normalized kinetic energy of a D mode with eigenfrequency ω_p ≈ 1.23 obtained with E = 10^-8, η = 0.71, and conical differential rotation ε = −0.25. This mode is clearly associated with a quasi-periodic orbit of characteristics and not with an attractor.