The present study carries out subsurface exploration of Jamshedpur region using Active Multichannel Analysis of Surface Waves techniques that provide information on the different lithological characteristics. Four different sites (MASW-1 to MASW-4) were chosen in proximity to river basin to obtain a probable shear wave velocity profile. To record the raw wave field traces produced by a 10 kg sledgehammer, a linear array of 24 numbers of 4.5 Hz geophones was employed. The effects of data acquisition parameters, like sampling frequency (500 Hz, 1000 Hz, and 2000 Hz) and offset distance (1 m, 6 m, 8 m, and 20 m), were used to obtain a high-resolution dispersion image. Due to the variables selected as data acquisition parameters, the optimal set of data parameters was found, providing the best resolution of dispersion images for all the selected sites. The results indicate that the best resolution of the dispersion image was produced at an offset distance range of 6–8 m at sampling frequencies range of 500–1000 Hz at 1 m geophone spacing with five stacking, indicating a strong signal to noise ratio in a range of 80–90%. Up to a depth of ~ 3 m, stiff silty clay soil was discovered, and at depths of 30 m or more, medium- to very-dense weathered mica schist was discovered. At sites MASW-1 and MASW-3, respectively, slag fillings were found in the top layer at depths of 1.2 and 2.3 m. Greater depths of hard rock layers have also been found at site MASW-3. Locations along the river generally fall into National Earthquake Hazards Reduction Program (NEHRP) categories C or D.

本研究使用表面波主动多通道分析技术对 Jamshedpur 地区进行地下勘探，该技术提供有关不同岩性特征的信息。在河流盆地附近选择了四个不同的地点（MASW-1 到 MASW-4）以获得可能的剪切波速度剖面。为了记录 10 公斤大锤产生的原始波场痕迹，采用了 24 个 4.5 赫兹地震检波器的线性阵列。数据采集​​参数的影响，如采样频率（500 Hz、1000 Hz 和 2000 Hz）和偏移距离（1 m、6 m、8 m 和 20 m），用于获得高分辨率色散图像。由于选择了作为数据采集参数的变量，找到了最佳数据参数集，为所有选定站点提供了分散图像的最佳分辨率。结果表明，频散图像的最佳分辨率是在偏移距离范围为 6-8 m、采样频率范围为 500-1000 Hz、1 m 地震检波器间距和五个堆叠时产生的，表明在范围为 80–90%。直到约 3 m 的深度，发现了坚硬的粉质粘土，在 30 m 或更深的深度，发现了中等至非常致密的风化云母片岩。在 MASW-1 和 MASW-3 站点，分别在 1.2 和 2.3 m 深度的顶层发现了炉渣充填物。在 MASW-3 站点还发现了更深的硬岩层。沿河地点通常属于国家地震减灾计划 (NEHRP) 的 C 类或 D 类。