Values of log(ω_s, jml) in the (J_R, J_φ) plane with fixed J_z = 10 kpc km s⁻¹, for a few combinations of (j, l) indices giving rise to resonant zones in action space (recalling that m = 2). The pattern speed Ω_p here is 1.89Ω₀. The two actions are renormalized by the radial velocity dispersion of the thin disc and the circular velocity at the Sun, respectively. The deep blue lines correspond to resonant zones. For instance, the (1, 0) case corresponds to the traditional outer Lindblad resonance (OLR) (for a non-zero J_z). Most other low-order combinations of indices did not give rise to any relevant resonant zone in the region of interest.