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

Figure 9

Sequence of the events that occurred in October 1984: (1) the seismic swarm is the result of an aborted magmatic intrusion that caused (2) the acceleration of the eastern flank (with PFS activation) and (3) the destructive earthquakes on TFS.