Abstract In this study, the Shanxi area is divided into three areas of north, middle and south, using seismic event waveform data in and around 50 km in Shanxi province from 2009 to 2019, using linear fitting, reduced travel time, and Hyposat batch processing methods. The crustal velocity models of each subarea are determined, and three methods are used to verify the subarea model: batch positioning to compare residuals, PTD method to determine the source depth, and unnatural seismic events. The results show that the zoning model has better applicability to the Shanxi 2015 velocity model. The difference between the zoning model and the Shanxi 2015 velocity model is mainly reflected in the propagation velocity of the P-wave in the upper crust and Moho and the depth of the Moho. The zoning model shows that the propagation velocity of the crust gradually decreases from north to south, while the velocity of the Moho surface gradually increases, and the depth of the Moho shows a trend of thick north and thin south. The upper crust velocity value is higher due to the Datong volcano in the northern region, while the lower crust and Moho velocity are lower, and the crust thickness is thicker. The upper crustal velocity of southern region is lower, due to the existence of huge thick sediments.
ZHANG Hui,ZHU Yuanqing,SONG Xiuqin et al. Establishment and Application of Regional Crustal Velocity Model in Shanxi Zone[J]. jgg, 2021, 41(5): 448-453.
ZHANG Hui,ZHU Yuanqing,SONG Xiuqin et al. Establishment and Application of Regional Crustal Velocity Model in Shanxi Zone[J]. jgg, 2021, 41(5): 448-453.
