Intrusive Seismic Swarms as Possible Precursors of Destructive Earthquakes on Mt. Etna’s Eastern Flank

Figure 6

Coulomb stress changes on the sliding plane ([57], see Figure 9 for location) resulting from the 1991, 2002, 2008, and 2018 dike intrusion models. The intrusions and particularly the 2002 and 2007 triggered the flank movement of the northern sector of the plane.