Vertical cuts of the z-component of velocity (left panel) and the x-component of the velocity (right panel) scaled with factor ρ ^1/2 ₀ at t = 100 minutes in the presence of a 370 km radius flux tube after subtracting the quiet-Sun simulation. The white–black colors mean positive–negative velocity directions; the range of the gray scale is the same in both panels. Vertical solid lines represent the boundaries of the flux tube. Vertical dashed lines correspond to the outer limits of the jacket mode region (see Figure 7), although they are only visible close to the tube.