Year: 2025
Type: article
Abstract: SUMMARY We investigate the modelling of P-wave reflections on the mantle transition zone (MTZ) discontinuities (Pv410p* and Pv660p*) using ambient seismic noise generated by distant oceanic sources. Using ray theory and waveform simulations, we assess biases in arrival times and amplitude ratios when interpreting noise correlations as Green’s functions. Our results show that source distribution and the b-caustic effect strongly influence signal recovery. Simulations based on realistic oceanic models (WAVEWATCH III) demonstrate that appropriate source conditions significantly reduce biases. This approach enables reliable imaging of the MTZ, particularly in regions like the greater Alpine area with favourable microseismic source distribution.
DOI: 10.1093/gji/ggaf275
Authors: P Pawlowski, H A Pedersen, P Boué, B Tauzin, L Tomasetto
Institutions: Centre National de la Recherche Scientifique, Institut des Sciences de la Terre, Institut de Recherche pour le Développement, Université Savoie Mont Blanc, Lyon 1 Université, École Normale Supérieure de Lyon, Laboratoire de Géologie de Lyon : Terre, Planètes et Environnement, Mantle 8 (France)
Language: English
Topic: Seismic Waves and Analysis
Subfield: Geophysics
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,416
Funders: Agence Nationale de la Recherche, Labex
OpenAlex ID: W4413094914