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

Figure 1

Surface fault map of Mt. Etna. Top inset map shows the main regional fault systems: MF = Messina–Fiumefreddo, ME = Malta Escarpment, and ATL = Aeolian-Tindari-Letojanni. Dashed line defines the sliding sector, and red arrows indicate its movement direction. FF = Fiandaca fault, STF = Santa Tecla fault, SVF = Santa Venerina fault, MOF = Moscarello fault, and SLF = San Leonardello fault. Blue squares show seismic stations of the University of Catania network operating on Etna in 1984.