Magnetic structure of a campfire. This illustrates the majority of the campfires in our model, i.e., those from groups (i) and (ii) defined in Sect. 3.2. The light and dark gray areas represent patches of opposite magnetic polarity in the photosphere where the two interacting bundles of field lines (red and green) are rooted. Following the reconnection, coronal emission is seen along a loop-like stretch (purple). Essentially, this follows the structure found in the model for the case shown in Fig. 5c. See Sect. 4.