The response of a soil to a seismic event is determined by its dynamic properties, its stratigraphic layout and the topography of the area. Currently there are different field and laboratory tests, which allow to know these dynamic properties, with some advantages and disadvantages in terms of their execution time, accuracy in results and cost. In this book we present the results of the dynamic properties of soils found in the fluviolacustrial deposit of the city of Tunja, determined through the Bender Element test and some triaxial tests, in order to contribute to the process of dynamic characterization of the city and therefore to its seismic microzoning. For the development of this research the soils samples had been collected in unaltered condition (minimum 30) in the companies of geotechnical studies of the city, initially couldn’t get any, because they had no recent studies in the study area, for this reason seven probings were conducted at sites located in the fluvio-lacustrine deposit of the city of Tunja in order to obtain the necessary samples for the investigation. Drilling was carried out with the UPTC manual drilling equipment, with depths until 9 meters. Completing the tests proposed for the investigation, the company López Hermanos Ltda. maked a geotechnical study in the study area, located in front of the Coliseum, from where two samples were received. In the same way, the company Civilterra S.A.S received two samples of a study carried out in the neighborhood of Las Quintas. Parallel to the process of sample collection, all available information from the existing dynamic and geotechnical characterization studies of the City of Tunja was consulted with the aim of complementing the research and being able to both validate and compare the results obtained. With the obtained soil samples, 32 Bender Element tests were carried out to determine the shear wave propagation velocities (Vs) and compressive wave velocity (Vp). These tests were performed on the natural moisture at which the soil was, then in saturated condition and for three different levels of consolidation, this to generate variation in the empty relation and to observe how these conditions affected the wave velocities. After running the Bender Element tests, the index properties of each of the samples were determined by means of moisture tests, Atterberg limits, specific gravity, organic matter content and granulometric analysis. For three of the samples obtained three cyclic triaxial tests were carried out. With the results obtained the following analysis were made: - Comparison of the variation of wave velocities for different test conditions. - Graphs were constructed in order to observe the variation of the shear wave velocity (Vs) as a function of properties such as: plasticity index, liquid limit and humidity. - The dynamic properties of the soil were determined. - The advantages and disadvantages of the Bender Element trial were identified areas of homogeneous behavior of the fluvio-lacustrial deposit of the city of Tunja were generated, according to the values of shear wave velocity (Vs) and compressive wave velocity (Vp) obtained by the Bender Element test; for which ArcGIS software version 10.4 was used. Finally, the results obtained were analyzed, comparing them and complementing them with projects and research already carried out.