Japan Geoscience Union Meeting 2018

Presentation information

[EE] Poster

S (Solid Earth Sciences) » S-IT Science of the Earth's Interior & Tectonophysics

[S-IT28] The lithosphere and the asthenosphere

Tue. May 22, 2018 10:45 AM - 12:15 PM Poster Hall (International Exhibition Hall7, Makuhari Messe)

convener:Catherine Rychert(University of Southampton), Hitoshi Kawakatsu(Earthquake Research Institute, University of Tokyo), Samer Naif(共同), Jessica M Warren (University of Delaware)

[SIT28-P06] A probabilistic approach to surface waves tomography of the upper mantle and lithosphere/asthenosphere boundary characterization

*Gaël Burgos1, Jean-Paul Montagner1 (1.Institut de Physique du Globe de Paris)

Keywords:Seismology, Tomography, Surface waves, Probabilistic inversion, Lithosphere/asthenosphere boundary

We have developped a non-linear, stochastic inversion procedure to generate 3-D upper mantle models from surface waves dispersion data.
This probabilistic approach is based on the parametrization of models using a (regional of global) optimized basis of smooth functions constructed by principal component analysis of a homogenized reference model.
It provides a reduced and optimized parameter space for the Bayesian inversion of an ensemble of seismic models.
The appraisal of the output ensemble of models allows for lateral regularization and probabilistic characterization of geological features within the model.
We have applied this inversion procedure using CUB (Shapiro & Ritzwoller 2002) as a starting model with an emphasis on the lithosphere/asthenosphere boundary properties.