Field data observation. Left) Distribution of measurement points on a 1:250000 orthophoto (ICGC, 2019) of the study area. The limit of the study area is marked in blue and the location of the Absolute Gravimetric Base used in this campaign is marked with a red circle. As can be seen in the image, the density of measurement points is greater on the North-West side of the study area. Right) Relative gravimeter CG-6 (Scintrex) and differential GPS (Trimble R8s) working at the same point.
Results of a gravimetric modeling. The upper graph corresponds to the fit between the observed gravimetric data (circles) and the calculated ones (black line), where the error (0.445; red line) is also shown. Each color of the geological section (lower graph) represents a formation (Fm.) with a differentiated density (D).
Seismic noise measurement with the H/V spectral quotient technique.
Example of the H/V spectral ratios obtained in soil (top) and rock (bottom) locations. The spectral quotients for each calculation window are represented in color, and the black line represents the average of all windows together with their error bands (dashed).