*3.2. Seismic Waveforms*

By using a 2D acoustic wave modeling algorithm [18], we calculated the reflection seismic records and wavefield snapshots corresponding to different shot points. We assume that the entire area is 5000 m wide, and the source and receiver position can be in this 5000 m area. The leftmost end of the image is set to *X* = 0 m, and the rightmost end is *X* = 5000 m. We can collect one seismic waveform at each seismic wave launch location. For convenience, for the input of multiple seismic waveforms, the experiment selects the shots at locations of 500 m, 1500 m, 2500 m, 3500 m and 4500 m. Figure 8 shows the seismic waveforms corresponding to different shot positions.

**Figure 8.** Seismic waveforms at different shot positions.
