Figure 1

Up-to-date geographic distribution of the Hurst index in central Italy (a) and temporal variations for the sites of Norcia (b), L’Aquila (c), and in the Fucino (FC) basin (d). The date of the largest shocks that occurred in the area are displayed in Fig. 1a. The shaded areas in Fig. 1b–d indicate the 68% confidence interval. The time series of cumulative seismic moment are superimposed in Fig. 1b–d (dashed lines).