Example of magnetic connectivity analysis for a jet in our catalog using NLFFF extrapolation. Left: jet detected in 304 Å, highlighted by the two white arrows. Middle: magnetic connectivity in the NLFFF data cube: open magnetic field lines are shown in yellow and closed field lines are shown in green on top of the 171 Å image. These lines are consistent with the 171 Å bright features including remote bright loops on the left outlined by the green lines, which confirms overall validity the NLFFF model. The open field lines at the cold (304 Å passband) jet location are shown in red. They do not have any obvious hot counterpart in the 171 Å passband. Right: idealized blobs of ejected cool thermal plasma moving away from the sunspot along the red field lines are show as dark red volume.