Observation of the local geometry of the velocity and magnetic fields for different types of dissipation structures. First two rows: cuts across the plane r_scan−r_⊥1 for four examples of structures we identify (for the same four scans as in Fig. 6). Last row: cuts across the plane r_⊥1−r_⊥2 for the velocity stream lines. Top plots show magnetic field lines, while bottom ones show velocity stream lines. The frame of reference is set to be the stationary wave frame at the centre of these images. The background is a two-channel colour map with red assigned to ohmic dissipation and blue to viscous dissipation.