Ambient Seismic Noise Tomography Of The Outre-Forêt Region (Alsace, France) From The EstOf Dense Tomography Seismic Array

Abstract

Traditional seismic imaging relies on body or surface waves generated by impulsive sources of natural (Local to teleseismic earthquakes) Or manmade (Explosions, vibrator trucks) Origins. After different processing, analysis and inversion schemes, they allow us to extend our knowledge of the internal structure of the earth at different scales. Uneven distribution of sources in time and space is usually the main parameter that limits the resolution of these tomographic images. For passive imaging, earthquakes distribution is an unavoidable problem and precludes the use of such technique in low seismicity regions. Artificial sources allow defining more suitable geometries, but are often synonymous with high costs and can be practically difficult to implement in hard to reach or restricted areas.