Jet 8: 2011 December 11 – Left panel: AIA 171 Å image of the jet observed on 2011 December 11. The jet appeared to evolve from the edge of the active region, 11374 (S17 E27), which was associated with a positive-polarity sunspot with anemone magnetic topology. A small-scale brightening was observed at a 03:21 UT at the jet footpoint, before the jet evolution. The jet evolved as a complex, multi-threaded spire. The jet started its activity at 03:21 UT and lasted until 03:26 UT. Middle panel and right panel: the LOS HMI magnetogram image at 02:28 UT, before the jet evolution, and at 03:24 UT, during the jet evolution, respectively. The negative-polarity cancellation followed by positive flux emergence at the edge of the negative-polarity region was observed and is shown by white arrows. This magnetic activity lasted for a few hours and was co-temporal and co-spatial with the jet activity.