Time period (1) with its unstable distribution function can be seen between 10:38:00 and 10:39:00. The figure follows the usual structure, but does not show all directions. It shows the sunward EPT and STEP directions. Vertical dashed blue lines indicate the three magnetic discontinuities discussed in the text. The “loop” is visible between 10:38 and just beyond 10:39 between the two blue lines. Measurements of this time period with the STEP sensor are shown in Fig. B.1 and clearly indicate that this time period was very anisotropic, even within the narrow STEP FoV.