Columns a and b: snapshots of the particle intensities and anisotropies along a selected magnetic field line (see text). This IMF line is indicated by a dashed line in the figures of the column c. Column c: integrated particle intensities drawn in grey shades on top of the radial velocity profile of the solar wind. Each row shows the results for each injection region labelled by their number (see Fig. 1). The blue and red vertical lines indicate the forward and reverse shocks, respectively.