Geometry and kinematics of the fault systems controlling the unstable flank of Etna volcano (Sicily)

摘要: Abstract An updated tectonic framework of Etna's unstable flank has been defined as a result multidisciplinary analyses carried out by integrating geological and geophysical data. The different typologies datasets have analyzed correlated in order to constrain the geometry kinematics fault systems controlling Etna volcano better understand their complex relationship with offshore morphostructures continental margin. In particular, we considered main structural elements following four systems: Pernicana, Ragalna, Tremestieri–Trecastagni Timpe. Slip-rates estimated both long- short-terms, respectively, from seismotectonic/geodetic Data integration allowed defining five kinematic domains sliding Etna: (1) NE block, bordered Pernicana characterised highest deformation velocities; ground velocity progressively diminishes toward South, clockwise rotation vectors (2) block embracing central part Timpe system; (3) Giarre wedge; (4) Medium-East bounded S. Tecla Trecastagni faults; (5) SE bordered, hidden Belpasso-Ognina lineament. dynamics these blocks takes place through discontinuous movements: sudden short-term accelerations related magma intrusion are superimposed fairly constant mid-term ESE sliding. proposed comprehensive model provides basic input parameters for applying analytical models volcano.