NODAL AMBIENT NOISE TOMOGRAPHY OF THE SALINA VOLCANIC ISLAND, SOUTHERN ITALY, UNVEILS ITS UNEXPLORED SHALLOW STRUCTURE
In the southern Tyrrhenian Sea, southern Italy, the multidisciplinary project CAVEAT deployed a dense seismic network composed by 120 wireless nodes, on three southernmost islands of the Aeolian volcanic archipelago to detect and locate the shallow weak seismicity related to both volcanic and tectonic activity, to constrain the crustal structure through regional and local tomographies, and to characterize the source mechanisms in this region.
Here we present the first ambient noise tomography for the Salina island, by using 2 months of continuous records from 40 three-component nodal stations, from late October to late December of 2023, to obtain a 3D shear wave velocity model. This study provides a detailed seismic image of the subsurface that will allow us to better understand the evolution of the volcanic activity from the two stratovolcanoes, Monte Fossa delle Felci and Monte dei Porri, to the three older volcanic structures (Monte Rivi, Pizzo Capo and Pizzo di Corvo), and the erosion and collapse processes.
This study is supported by the collaboration INGV – University of Geneva – UNAM, as part of the INGV Pianeta Dinamico project 2023-2025 CAVEAT “Central-southern Aeolian islands: Volcanism and tEAring in the Tyrrhenian subduction system” (grant no. CUP D53J19000170001) supported by the Italian Ministry of University and Research “Fondo finalizzato al rilancio degli investimenti delle amministrazioni centrali dello Stato e allo sviluppo del Paese”, legge 145/2018.