Ricerc@Sapienza

The Sulmona valley, located in the internal portion of the Central Apennine (Central Italy) is characterized by the presence of NW-SE active faults, with extensional kinematics, is considerate historically capable of generating damaging earthquakes.
The present-day seismicity of the Sulmona valley (mainly micro-seismicity), has been studied in the recent past by authors (generally using a simplified 1D velocity model) with the aim to constrain the geometry of the Sulmona extensional faults system using the earthquakes relocation and analyse the seismic hazard associated to the possible earthquake enucleation.
Indeed, the very low seismicity detected for the Sulmona area (seismic gap), can represent a concrete risk if contextualized with the active tectonics of the Central Apennine, as observed for the seismic sequence of Accumoli-Amatrice and Norcia 2016.
The aim of this project is to use a 3D approach, implementing for the study of the seismicity of the Sulmona valley, a detailed 3D geological and velocity model (constructed during the three years of my Ph.D. for the study area).
In particular, the 3D velocity model will be used for the 3D relocation of the earthquakes of the area using the 3D tomographic software of the INGV institute of Rome.
As a next step, a 3D structural analysis of the main potential seismogenic extensional fault of the area will be carried out using the software Petrel and MOVE, in order to estimate the 3D faults properties (e.g. the fault dip and the displacement) and their variation in 3D.
Finally, the 3D velocity model will be also crucial for the study of the seismic waves propagation in the subsurface, resulted by the possible earthquake enucleation.
In this sense, Ground Motion analysis can be useful to characterize the seismic hazard of the area, in which the amplification of the seismic waves due to the presence of the Plio-Quaternary deposits represents a concrete risk in the valley.