Fig. 4From: Feasibility study on calculating the Q value of shallow media by using a dense seismic array and a large-volume airgun sourceThe ray path and the 1-D velocity model. X in a represents the east–west direction, and Y in b indicates the north–south direction. c is the 1-D S-wave velocity model in the Binchuan area proposed by Chen et al. (2016)Back to article page