E2VP: Validation Phase Model

Acknowledgment

All the computations presented in this page were performed using the Froggy platform of the CIMENT infrastructure, which is supported by the Rhône-Alpes region (GRANT CPER07_13 CIRA) and the Equip@Meso project (reference ANR-10-EQPX-29-01) of the programme Investissements d'Avenir supervised by the Agence Nationale pour la Recherche.

Purpose

Simulate realistic earthquakes ground-motions in a complex three-dimensionnal geological medium (the Mygdonian basin, Greece) including topography and viscoelastic attenuation.

Related Reference

Chaljub et al., How sensitive is earthquake ground motion to source parameters? Insights from a numerical study in the Mygdonian basin. EGU-2014. Download PDF file

EFISPEC3D's Computations

20 viscoelastic simulations with a duration of 30.0 s (150,000 time steps) have been computed. Each simulation ran for about 11 hours on 512 cores (equivalent 1 core = 20 x 11 x 512 = 112640 hours).

Mesh

The mesh used for the numerical simulation is composed by 4,764,721 hexahedron elements and about 316 million Gauss-Lobatto-Legendre collocation points (i.e., ≈ 950 million degrees of freedom). The mesh is refined two times; once when approching the free surface and once again inside the low-velocity basin to respect the numerical dispersion relationship.