  Using a statistical correlation analysis, we compute evolution of the
magnetic Kubo number during an edge pedestal collapse in nonlinear reduced
magnetohydrodynamic simulations. The Kubo number is found not to exceed the
unity in spite of performing the simulation with a highly unstable initial
pressure profile to the ideal ballooning mode. During the edge pedestal
collapse, the Kubo number is within the values of $0.2$ and $0.6$ suggesting
that the quasilinear diffusion model is sufficient to explain the energy loss
mechanism during the pedestal collapse. Temporal evolution of poloidal
correlation lengths of pressure fluctuations resembles with that of the
Chirikov parameter and the Kubo number; while radial correlation lengths of the
pressure fluctuations are strongly correlated with the radial width of the
magnetic stochastic layer.
