Fig. 2: Strain fluctuations and correlations.

a, b Granular experiment. a Spatiotemporal correlation function C(δx = 0, δεM) as a function of δεM see Eq. (3). b Spatiotemporal evolution of the local strain γT(x, εM) (see text) in a shear band. c, d Californian earthquake catalog. c Spatiotemporal correlation function C(δx = 0, δt) as a function of δt (see Supplementary Methods 1). d Spatiotemporal evolution of the seismic moment M resulting from earthquakes from the Californian catalog projected along the main direction of the fault (see Supplementary Methods 1 and Supplementary Fig. 1 for details).