סמינר בחוג לגיאופיזיקה

Abstract:

Time-reversal consists in measuring a wave field on a surface surrounding a given medium and applying the time reverse of those measurements as a boundary condition. Such a process allows reconstructing the wave field back in time and focusing the seismic energy at the actual source. In this talk, I first present an accurate method to implement the time-reversal technique in any numerical schemes which are based on the discrete form of the wave equation (e.g. finite differences or finite/spectral elements). Then I show how this method can be used for different tomographic applications. Finally, I discuss the potentials and limitations of the time-reversal imaging of seismic sources.

מארגן הסמינר: פרופ' איל חפץ