Top panel: snapshot of the vertical kinetic energy and the density profile at t = 8.4 min with the vertical resonant surface (dashed black curve) obtained in Fig. 14. The orange density contours are the same as those in the bottom panel of Fig. 4. Bottom panel: snapshot of the y-component of the kinetic energy and the density profile at t = 32 min with the horizontal resonant surface (dashed green curve) obtained in Fig. 14. The orange density contours are the same as those in the bottom panel of Fig. 11.