BPT diagrams showing the line ratios (Emonts 2006) of the off-nuclear regions of B2 0258+35. The blue stars represent the line ratios from the spectrum extracted from the south-western region, offset by ∼1.4 kpc from the nucleus, with PA = 64°. The red dots represent the line ratios from the spectrum extracted at a similar distance off the nucleus in the north-eastern region. The points clearly lie in the LINER portion of the diagram, suggesting the presence of shocks.