Overview of an impact, impact 9, in an active region as seen in UV (1600 Å) and EUV (171 Å) channels. The red/blue contours outline magnetic fields of +/−100, 300, 500 G. a) Composite of 1600 Å and downflow tracks. b) 171 Å base difference image showing the downflow filaments. c), d) 171 Å base-difference images of the impact, scaled between ± 300 DN s^-1. The base image was at 07:10:00 UT. The red arrow points to the impacting filament and the white arrow points to an earlier impact that seems to have affected the structure of this impact. The evolution of the impact is shown in the movie.