Figure 4

(a) ME occurrence in time in relation to injection rates into Prati-9 (blue), Prati-29 (magenta) and both wells (black). Colors indicate ME overlapping level. Peak and low injection rate periods are marked with gray and yellow, respectively. (b–d) Maps of ME overlapping level for: (b) all ME, (c) ME which occurred during low injection periods, (d) ME which occurred during high injection periods. Remaining ME are plotted as small grey dots.