Radial velocities relative to the cluster velocity for different sub-areas against angular distance from the centre (in all directions). Blue dots mark areas that are expanding at high velocity, v_exp ≈12 km s⁻¹, and yellow circles (smaller) areas expanding at moderate speed, v_exp ≈ 4 km s⁻¹, when assuming spherically expanding systems (dotted curves). Green circles mark areas with intermediate velocities (‘DQ’ is the Dancing Queen). Red squares show areas with components whose velocities are redshifted relative to the cluster.