Proper motions of 22 GHz water masers in the northern regions of NGC6334I, before and during the accretion burst. The positions, orientations and colours of the arrows show the positions, proper motions and VLSR of the maser features, respectively. The colour scale is on the right. The left panels show the pre-burst epochs (2014.72−2015.28) and the right panels show the burst epochs (2015.88−2016.19). The linear scales in position and space are shown in the bottom left corner of each panel. In the bottom panel, the black dashed lines show the position and orientation of the linear features shown in the maser features, and the black arrow shows the displacement of the maser features after the accretion burst.