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The challenging seismotectonic characterization of multi-depth compressional domains in areas with low-deformation rates and blind thrusting.

de Nardis R.
  Venerdì 16/09   10:00 - 12:00   Aula U - Giuliana Cini Castagnoli   IV - Geofisica e fisica dell'ambiente   Presentazione
Defining the geometry and kinematics of potentially seismogenic structures in compressional domains is not straightforward, especially in areas with low-deformation rates and blind onshore or offshore thrusting. Furthermore, the coastal and offshore zones do not allow proper seismic and geodetic monitoring systems leading to inaccurate locations of seismic events, unconstrained GPS velocities, and consequently a poor knowledge of the active tectonics. I will show key cases of 3D fault modeling and seismotectonic characterization, along the Outer Thrust System (OTS) of Italy, defined by integrating geological and seismological data with variable quality. Starting from recent findings of multi-depth compressional domains in eastern Central Italy, built with high-resolution seismic locations, I will discuss the possible extension of the deformation style of compressional domain in Northern Italy and Sicily by using spatio-temporal seismicity cluster and kinematics analysis. Finally, I will present new seismic tomography results, along a segment of OTS located in the Abruzzi-Molise region, highlighting an unknown thick-skinned deformation style.