The aim of the project was to yield an image of the subduction process of the NAZCA plate underneath South America. To obtain information about the velocity too, a combined near-vertical, wide-angle reflection/refraction seismic investigation was carried out. The profile stretched W-E at 21 degree S for 370 km from the coast of the Pacific ocean (Chile) until the Altiplano in Bolivia. 252 seismic channels were deployed. The applied shot scheme resulted in a four fold coverage. Note that the data offered here only encompass those from the wide-angle reflection/refraction measurements.