GNGTS 2022 - Atti del 40° Convegno Nazionale

62 GNGTS 2022 Sessione 1.1 The adoption of strike-variable and elliptic faults in static Coulomb stress transfer modelling revealed significant differences in terms of the amount of transferred stress and stress patterns on the receiver faults compared to the classical planar and rectangular faults. In particular, the effect of ellipticity in increasing lateral extension of the fault surfaces at about half of their maximum depth considerably reduces the distance between neighboring faults (Fig.2a and Fig.2b), increasing the degree of interaction and consequently the amount of static Coulomb stress transferred to the tips of the receiving faults located along strike of the source faults (Fig.2). We also found differences in the stress pattern generated on laterally sub-parallel Fig. 2 - Example of Coulomb stress transfer calculated on pilot a) rectangular faults and b) elliptic faults. Two receiver faults are placed along strike and parallel respect to the source fault to show the Coulomb stress change in both directions. Red lines are the surface traces of the faults. Colours refer to the amount of Coulomb stress change expressed in Bar. Note the stressed (red) tip of the elliptic receiver fault along strike and the stress shadow on the parallel one.