Isosurfaces at ﹩\vert \boldsymbol{B}\vert _{\mathrm{max}\,}/ 2﹩ from a tunnel reconnection. This is from an RR6 simulation at ﹩\mathstrut{\cal T} =10﹩, at a uniform Lundquist number of ﹩S_{\eta }=2880﹩. Flux tube 1 is parallel to the ﹩-\hat{\boldsymbol{z}}﹩ axis and flux tube 2 is at an angle ﹩\theta =6\pi / 4﹩ relative to flux tube 1. This shows how the tubes reconnect twice to exchange center sections and tunnel. Note that the viewpoint changes from (a) to (b), and then changes back again in (f). The times shown are ﹩tv_{\mathrm{A}\,}/ R=[ 0,\ 25,\ 42,\ 52,\ 61,\ 70] ﹩.