Fig. 3From: Feasibility study on calculating the Q value of shallow media by using a dense seismic array and a large-volume airgun sourceTravel time curve of S waves. The epicentral distance from the shot point is labeled on the left. The green dots indicate the picked onset of S waves manually, and the slope of red line is 3.3 km/s. The amplitudes at all stations are reduced by a factor of 0.5Back to article page