Time-distance plot for the parallel (top), normal (middle), and azimuthal (bottom) velocity component for a line in the loop interior (left) and loop exterior (right) in a simulation with a magnetic field that is inclined 15°. The dotted red lines indicate the transition region and the solid red line shows the β = 1 height with high β beneath the line. The plots without that line have high β for all heights. The dashed lines show the sound speed, dotted lines show the Alfvén speed, dash dotted lines show the kink speed, and solid lines show the tube speed. The black lines show these speeds for wave propagation along the magnetic field, while the brown lines show speeds for vertical wave propagation. The extreme values (only in reflection zones) in the plots for the parallel and azimuthal component are saturated to make the other structures visible as well.