Articles | Volume 12, issue 11
Research article
19 Nov 2021
Research article |  | 19 Nov 2021

3D crustal structure of the Ligurian Basin revealed by surface wave tomography using ocean bottom seismometer data

Felix N. Wolf, Dietrich Lange, Anke Dannowski, Martin Thorwart, Wayne Crawford, Lars Wiesenberg, Ingo Grevemeyer, Heidrun Kopp, and the AlpArray Working Group

Data sets

AlpArray Seismic Network (AASN) temporary component AlpArray Seismic Network

RESIF-RLBP French Broad-band network, RESIF-RAP strong motion network and other seismic stations in metropolitan France RESIF

Regional Seismic Network of North Western Italy University of Genoa

Mediterranean Very Broadband Seismographic Network (MedNet) MedNet Project Partner Institutions

Rete Sismica Nazionale (RSN) INGV Seismological Data Centre

Short summary
The Ligurian Sea opened ~30–15 Ma during SE migration of the Calabrian subduction zone. Using ambient seismic noise from stations on land and at the ocean bottom, we calculated a 3D shear-velocity model of the Ligurian Basin. In keeping with existing 2D studies, we find a shallow crust–mantle transition at the SW basin centre that deepens towards the northeast, Corsica, and the Liguro-Provençal coast. We observe a separation of SW and NE basins. We do not observe high crustal vP/vS ratios.