“…First of all, it is important to stress that although our findings suggest that ETAS-type models can, at the very least, serve as a legitimate alternative view of seismicity, there are still some unresolved open issues and certainly room for further refinement. Several authors have reported sources of bias related to the lower magnitude cut-off (Harte, 2016; Schoenberg et al, 2010; Seif et al, 2017; Wang et al, 2010), the finite catalog length and the duration of sequences (Hainzl et al, 2016; van der Elst, 2017; Wang et al, 2010), aftershock incompleteness (e.g. Hainzl et al, 2013; Seif et al, 2017; Zhuang et al, 2017), potential time-dependence of the background rate (Hainzl et al, 2013), the use of an isotropic kernel for the spatial distribution of direct aftershocks (Bach and Hainzl, 2012; Guo et al, 2015; Hainzl et al, 2008), sample size (Harte, 2018) and potential spatial, temporal, and intersequence variability of parameters (e.g.…”