Fig. 4

a Evolution of cumulative number of earthquakes declustered using ETAS model of the seismic clusters shown in Fig. 1. Time is measured from August 2003 and each curve is normalized to its final value. The gray dashed line shows the average of all clusters. The black dashed lines show the occurrence times of giant earthquakes worldwide and of large regional earthquakes. The legend indicates the names of the clusters displayed in Fig. 1. b Seismicity rates of the clusters displayed in a. The upper black trace is the mean of the rates. The color scale shown on the lower right corner refers to the normalized cumulative number of earthquakes