Regional terrain-based VS30 prediction models for China

Abstract Time-averaged shear-wave velocity to 30 m ( V S ) is commonly used in ground motion models as a parameter for evaluating site effects. This study collection of boreholes Beijing, Tianjin, Guangxi, Guangdong, and three other municipalities provinces, which were divided into regions with reference the seismic zonation map China, establish prediction based on terrain categories. Regional effects verified by comparing morphometric (topographic slope, surface texture, local convexity) thresholds classification maps obtained from global digital elevation model (DEM) data regional DEM regions. Additionally, using both types established analyzed comparatively provide credible China. Through analysis correlations between measured values predicted values, calculation mean squared error absolute percentage each region, consideration geological characteristics boreholes, finally applied developing Intercomparison indicated that subregional necessary classification. Finally, spatial method adopting inverse distance weighting residuals was update initial models. The developed could be construction earthquake disaster scenarios. Graphical