Gas surface density maps in the inner 600 × 600 au² box in the clump-infall model. Top and bottom rows: disk structure corresponding to the Clump2 and Clump3 bursts in the second and third rows of Fig. 1. First and second columns (from left to right): time instances preceding the burst, while third column: disk during the burst. The yellow arrows show the positions of perturbed clumps that fall onto the central star, while the red arrows indicate the clump that is involved in the close encounter. The disk is rotating counterclockwise.