The ratio of an amplifier's output to its input, denoted by the symbol AF, is known as the amplification factor, or gain. Measuring the extent to which the soil layer from the bedrock to the surface would intensify the seismic effect is crucial. This study aims to quantify a power plant site's amplification factor in connection to ground improvement. Chichi and Kobe were the two earthquakes that were chosen for analysis. Shear wave velocity served as the primary basis for the analyses. At the aforementioned site, data on soil characteristics and other topics were gathered. The shear wave velocity was 160 m/s at surface level and 640 m/s at 120 m deep. Similarly, shear wave velocity was 1100 m/s at ground level and 640 m/s at 120 m depth following ground improvement. DEEPSOIL software was used to do the analysis. Using the following inputs: soil layer depth, unit weight (γ), and shear wave velocity (Vs), soil amplification was calculated using equivalent-linear analysis. Amplification factor as well as PGA values dropped in both earthquakes at the same frequency.