Constraint on L obtained by identifying the QPO frequencies with crustal torsional oscillations, together with the experimental constraint on K₀. The shaded region with hashed lines and the region enclosed by the dashed line denote the constraints on L, for stellar models with N_s/N_d = 0 and 1, respectively. From our analysis, we find L = 59.5–96.8 MeV. The fiducial value of L from experiments, L = 60 ± 20 MeV (M. B. Tsang et al. 2012; W. G. Newton et al. 2014; B.-A. Li et al. 2019), and the constraint obtained from the analysis of magnetar QPOs, L = 58–73 MeV (H. Sotani et al. 2018; H. Sotani 2024), are also shown with the light and dark gray shaded regions, respectively.