<p>Earthquake mitigation and soil investigation for seismic hazard analysis in a potentially active seismic zone around the southern Himalayan region are significant concerns. Since the alluvium soil deposits have a substantial effect on the amplitude of ground motion during earthquake energy transmission. In evaluating the soil stiffness of the layer overlying bedrock; it is necessary to measure the shear wave velocity (SWV) of the soil horizon. To calculate SWV, microtremor array measurements (MAM) were performed nearby borehole locations drilled to a depth of 30&#xa0;m with standard penetration test blow counts (SPT) N values. This study presents power regression analysis to establish a relationship between SWV and SPT-N values. The laboratory analysis of index properties was conducted concurrently with the collecting of soil samples from boreholes. The lithology extracted from the drilled borehole has shown that the clay is of low plasticity, with dominant silty sand followed by medium to fine-grained sand to a depth of 30&#xa0;m. The established empirical relationship in this study suggests a correlation coefficient (R²) value of 0.554 for uncorrected N values showing a reasonably strong correlation, and 0.402 for corrected N values (overburden correction), indicating a moderate correlation. Accordingly, uncorrected SPT-N values indicate that shear wave velocity strongly correlates with in-situ conditions with a correlation coefficient (R²) of 0.554 for all types of soil. As per the National Earthquake Hazards Reduction Program (NEHRP) classification, the study area comes under class D soil based on shear wave velocity and N values. In addition, a new empirical relationship was established between SWV and SPT-N values in the Indo-Gangetic Plain (IGP) used for mitigation of seismic hazards and vigilance in geotechnical engineering applications.</p>