Log-log plot of diffusion coefficients (D) as a function of timescale (τ). Black solid line: A linear fit to the data points determined from trajectories of the Sunrise Ca ii H MBPs. The 95% confidence bands to the fit are overplotted as dot-dashed lines. For comparison, similar plots (for quiet-Sun regions) from Lawrence et al. (2001) (red solid line) and Abramenko et al. (2011) (green dashed line) are overlaid.