Calculated turbulence α_frag responsible for the fragmentation velocity υ_frag = 1 m s⁻¹ and gas-to-dust ratio of 100. An overall low value of 10⁻⁴ is found in five out of seven disks. IM Lup appears to show a systemically higher value of ~10⁻³. An increasing α_frag is found in HL Tau, which could be associated with the late-infalling material; see discussion. The infalling accretion shock impact on the disk traced by SO and SO₂ located at 50–100 au (Garufi et al. 2022) is roughly consistent with the B85 ring, where we also find the peak in α_frag. In the region dashed by orange lines, the data in all wavelengths used in the multi-wavelength analysis are optically thick, and therefore the results are less robust.