3 ECTS, C. 18h
Understanding Earth’s interior mechanisms, assessing seismic hazard due to earthquakes and volcanoes, securing our access to hydrocarbon resources and monitoring CO2 storage sites, all represent crucial issues for modern societies. They all share the same need for a deep and accurate knowledge of the Earth interior, particularly the crust. We present in this course a seismic imaging method yielding unprecedented high resolution information on the subsurface structure. This seismic imaging method is formulates as an optimization problem, constrained by partial differential equations representing seismic wave propagation. We study in this course all of the constitutive elements of this method, insisting on mathematical and numerical aspects of it: wave modeling in heterogeneous media, large scale optimization methods, implementation on high performance computing parallel architectures.