Project FINDER aims to identify and characterize the active trace of the Lower Tagus Valley (LTV) fault zone using a revolutionary and relatively new technique: airborne LiDAR (Light Detection And Ranging). In the first phase of this project, high-resolution LiDAR data will be used to determine the extent, geometry, and segmentation behavior of the LTV fault zone. In the second phase, with the aid of LiDAR imagery, four to six trench sites will be carefully selected for detailed paleoseismic investigation, to analyze evidence for recent deformation, and to assess mean slip rates and earthquake recurrence intervals.