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Authors: Barreca, Giovanni* 
Scarfì, Luciano* 
Gross, Felix* 
Monaco, Carmelo* 
De Guidi, Giorgio* 
Title: Fault pattern and seismotectonic potential at the south-western edge of the Ionian Subduction system (southern Italy): New field and geophysical constraints
Journal: Tectonophysics 
Series/Report no.: /761 (2019)
Issue Date: Jun-2019
DOI: 10.1016/j.tecto.2019.04.020
Keywords: Subduction system
Slab edge tear
Active faulting
Seismic profiling
Calabrian Arc
Subject Classification04.07. Tectonophysics 
Abstract: The south-western edge of the Calabrian Arc in southern Italy has been investigated throughout a joint analysis of field, marine and geophysical data which provided constraints on the fault pattern and on the seismotectonic potential. The study was focused on a poorly known sector of a larger belt of seismically active faults slicing across the NE corner of Sicily, the so-called Tindari Fault System. Our data pointed out that the investigated area, including the mainland and the Ionian offshore, is deformed by oblique faulting with a general NW-SE tectonic trend. Earthquake distribution and seismic profiles pointed out active deformation in the offshore while the mainland is characterized by the occurrence of a NW-SE oriented,>20 km-long, structural belt. However, scarce seismicity has been recorded in the last 30 years alongside this tectonic structure, accounting for a possible silent segment of the larger fault system. Tomographic images revealed that the Moho discontinuity is deformed by a NE-dipping lithospheric tectonic structure which has been here retained the main mode of deformation and responsible for coseismic displacement in the area. As a whole, field and geophysical data agree with a general NW-SE trend segmented pattern of recent/active faults that have the potentiality of generating magnitude 6.5–7 earthquakes.
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