As thermal overpressurisation may provide a positive feedback between slip and strength fall at the fault plane, a common opinion is that it may enhance the faulting process instability. After the main shock, the pressure gradient between the fault plane and the neighbouring rock causes a fluid flow which increases pore pressure in the surrounding fracture networks; such increase may trigger new faulting processes by reactivating adjacent faults, giving rise to aftershocks. Analogously, artificial pore pressure increase, by fluid injection in Earth’s crust, may induce seismicity.