The article introduces three methods for evaluating the potential of soil liquefaction using in situ testing. The first method assesses the likelihood of soil liquefaction initiation based on factors like clay content and water content. The second method focuses on determining the resistance of soil to liquefaction using tests like SPT and CPT. The third method involves assessing the liquefaction index and deformation of soil layers. By integrating data from these tests, the potential for soil liquefaction at a site can be calculated.