Energetic electrons observed in situ at 1 AU. The electrons were observed by two spacecraft: STEREO-B/SEPT at 45–55 keV and WIND/3DP at 20–30 and 30–50 keV. The start time of Sources 1, 2, and 3 is annotated with the blue and red arrows. The STEREO-B electron intensities were multiplied by factors of 0.05 for the sunward-looking telescope and by 0.04 for anti-sunward-looking telescopes and the data were normalised so that the intensities agree at 16:00 and 20:00 UT. The electron intensities observed by the two spacecraft started increasing shortly after the onset of Sources 2 and 3, denoted by the vertical red dashed line.