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

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Cited articles

Adimah, N. I. and Padhy, S.: Ambient noise Rayleigh wave tomography across the Madagascar island, Geophys. J. Int., 220, 1657–1676,, 2020. 
Aki, K.: Space and Time Spectra of Stationary Stochastic Waves, with Special Reference to Microtremors, Bull. Earthq. Res. Inst. Univ. Tokyo, 415–456, 1957. 
AlpArray Seismic Network: AlpArray Seismic Network (AASN) temporary component, AlpArray Working Group, Other/Seismic Network [data set],, 2015. 
André, G., Garreau, P., Garnier, V., and Fraunié, P.: Modelled variability of the sea surface circulation in the North-western Mediterranean Sea and in the Gulf of Lions, Ocean Dynam., 55, 294–308,, 2005. 
Barmin, M. P., Ritzwoller, M. H., and Levshin, A. L.: A Fast and Reliable Method for Surface Wave Tomography, in: Monitoring the Comprehensive Nuclear-Test-Ban Treaty: Surface Waves, Birkhäuser Basel, Basel, 1351–1375,, 2001. 
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.