Bogotá sits atop a large fluvio-lacustrine sedimentary basin filled over the past 3.2 million years. The basin transitions from granular alluvial-colluvial soils at the edges to very soft lacustrine clays and silts in the center, with sediment thicknesses up to 500 m and soft soils dominating the upper 50–150 m. Strong motion records indicate significant seismic amplification, making shear-wave velocity profiling essential for foundation design and seismic site response studies. Passive surface wave methods, particularly HVSR and SPAC using ambient noise and strong motion data, were applied at five sites to characterize the basin’s deep structure. Joint inversion of HVSR and high-resolution SPAC data using the diffuse field approach yielded shear-wave velocity profiles down to 90–480 m, with improved accuracy over conventional methods. These results enhance the understanding of deep soil behavior and support improved seismic hazard microzonation in Bogotá.
