Figure 7
Magnitude, cumulative event number and various statistical parameters (e.g. b-value, D and spatial correlation length SCL) estimated for M0.8 + earthquakes from 2003 to 2020. The parameters were estimated for consecutive groups of 300 events with a running step of 50 events. Red vertical dashed lines show the positions of the M4.0 + earthquakes in Zigui and Badong area. The vertical blue bars in b_value show the standard error and the horizontal bars in b_value, D and SCL show the time scan window. Red horizontal line shows the background b-value in the Three Gorges reservoir. The red arrow lines indicate the trend of the statistical parameters. Green solid line shows the water level from May 2003 to May 2020 Red stars indicate the moderate earthquakes with M ≥ 4.0.
