ABSTRACT
Recent studies highlight the effectiveness of microtremor analysis in evaluating the liquefaction potential of soil. This technique is widely acknowledged for its speed, cost-efficiency, and applicability across diverse settings. In this study, microtremor data were collected from 57 different locations within the core areas of the Kathmandu Valley and analyzed using Nakamura’s method. Liquefaction susceptibility at each site was assessed by calculating the vulnerability index (Kg), which incorporates both the amplification factor and the fundamental frequency of each station. To verify the accuracy of this method, the results were compared with those from nearby borehole-based liquefaction assessments. A threshold Kg value was established from both approaches and further evaluated against thresholds reported in previous researches. The overall findings demonstrate that microtremor analysis is a reliable and practical tool for estimating soil liquefaction potential, particularly in regions where conventional testing methods may be limited or costly.
