Modified tidal quality factor as function of tidal frequency for m = 2, E = 10⁻⁷, and Pr = Sc = 1. Vertical dotted lines indicate the tidal frequencies for the four Galilean Moons of Jupiter (from right to left: Io, Europa, Ganymede, Callisto). The magenta dashed line indicates the values of these quantities in the case of a purely convective interior . The dash-dotted orange line marks the observed value of this quantity due to Io.