The influence of non-uniform ambient noise on crustal tomography in Europe

Piero Basini (1) , Tarje Nissen-Meyer (2) , Lapo Boschi (3) , Emanuele Casarotti (4) , Julie Verbeke (5) , Olaf Schenk (6) , Domenico Giardini (2)

1 Department of Physics
2 Institute of Geophysics [ETH Zürich]
3 iSTeP - Institut des Sciences de la Terre de Paris
4 INGV - Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Roma
5 Institute of Geophysics, Lamont-Doherty Earth Observatory,
6 Institute of Computational Science

Ambient-noise seismology is of great relevance to high-resolution crustal imaging, thanks to the unprecedented dense data coverage it affords in regions of little seismicity. Under the assumption of uniformly distributed noise sources, it has been used to extract the Greens function between two receivers. We determine the imprint of this assumption by means of wave propagation and adjoint methods in realistic 3D Earth models. In this context, we quantify the sensitivity of ambient-noise cross correlations from central Europe with respect to noise-source locations and shear wavespeed structure.

Domaines: Sciences de la Terre

Piero Basini, Tarje Nissen-Meyer, Lapo Boschi, Emanuele Casarotti, Julie Verbeke, et al.. The influence of non-uniform ambient noise on crustal tomography in Europe. Geochemistry, Geophysics, Geosystems, 2013, pp.1-52. ⟨10.1002/ggge.20081⟩. ⟨hal-00816943⟩