Temporal evolution of a fan-shaped jet observed in the active region NOAA 12579 with the GST at BBSO on August 25 2016 between 18:52 UT and 18:59 UT. The different panels show: the TiO images (panels a1–a4), the H_α blue wing images at −0.8 Å (panels b1–b4), and H_α red wing images at +0.8 Å (panels c1–c4). All Hα images are obtained with the GST/VIS. R1 represents the area where the jet occurred (FOV of Figs. 2 and 4). The footpoint and front of the jet are marked by a red circle and magenta dots, respectively.