Extended Data Figure 5: Magnitude histogram of analysed catalogue and frequency-magnitude distributions for different data subsets.
From: Gradual unlocking of plate boundary controlled initiation of the 2014 Iquique earthquake
a, Frequency–magnitude distribution of earthquakes within latitude 17.0°–21.0° S and longitude 70.0°–72.0° W, used in our b-value analysis and ETAS modelling. The histogram of the overall seismicity is shown by grey boxes, and thin lines refer to the cumulative distributions of foreshocks, aftershocks and the overall activity. Bold lines refer to the data used for the analysis above the magnitude threshold (Mc 3) ignoring periods of incomplete recordings after larger earthquakes. b, Frequency–magnitude distributions at different times before the mainshock. The distributions correspond to the b values shown in grey in Fig. 3e.
