MAUFROY , Emeline

The surface topography can generate amplifications of the ground motion due to the incidence of seismic waves. The numerical prediction of the topographic amplification factor is qualitatively good but the predicted amplification levels often underestimate the observed levels. In this thesis we develop a methodology to objectively characterize...

By means of three-dimensional (3-D) numerical simulations, including the Laboratoire Souterrain à Bas-Bruit (LSBB) topography, we carefully analyze site effects assessments yielded by two approaches: the classical site to reference spectral-ratio method (SRM) and the statistical median reference method (MRM). We show for both isotropic and...

By means of three-dimensional (3-D) numerical simulations, including the Laboratoire Souterrain à Bas-Bruit (LSBB) topography, we carefully analyze site effects assessments yielded by two approaches: the classical site to reference spectral-ratio method (SRM) and the statistical median reference method (MRM). We show for both isotropic and...

International audience

International audience

International audience

A tomographic P-wave velocity model is inferred from a ground level-to-gallery vertical 500 m × 800 m seismic experiment conducted at the inter-Disciplinary Underground Science and Technology Laboratory (LSBB, France). No initial knowledge of the velocity structure of the surrounding fractured-porous carbonates was previously available....

We discuss mantle structure and dynamics under the Gibraltar arc. For that region, a large variety of geodynamic models has been proposed, and there was, up to recently, no consensus on which of these models is the best one to describe the geodynamic situation of the region. The key to distinguishing the different models probably lies in the...

International audience

This report is based on data provided by the services responsible for seismic monitoring in France (RéNaSS for the CNRS and the Universities, the ISTerre and Géoazur laboratories for the Universe Science Observatories, LDG for the CEA).The earthquake of April 7, 2014 occurred at 19:27 UT (21:26:59 local time) in the Alpes-de-Haute-Provence. Its...

International audience