Energy deposition in terms of Ohmic heating rate per particle μ₀ηj²/n. Panel a: top view of an average over 2 min (14.5 to 16.5 min) and in the vertical direction from z =0 to 30 Mm. Panel b: average over a stripe with y = 160 to 183 Mm, as indicated in panel a (also averaged over 2 min). The white square shows the region of interest with the compact small loop (indicated by arrows in both panels); compare with Fig. 2.