Figure 4
(a) The map view, (b) M–t diagram, and (c) profile along L1 in (a) of seismicity during the first injection period. Blue and black cycles are events belonging to clusters α and β, respectively. The average wellhead pressure and the wellhead pressure of HUK22 in (a) are shown in (b) as black curve and dark green curve, respectively. Beach balls in (a) and (c) correspond to the focal mechanisms of the two largest events from Zhou et al.22. The black box indicated the seismic zone formed by the cluster α. The solid red and blue lines in (c) are faults interpreted from the seismic reflection profile described by Jiang et al.18 and faults inferred from seismic and geologic surveys23,33, respectively. The dashed red line depicts an extension of cluster α.
