Ion and electron intensities around the shock crossing on 18 Feb. 2013, observed by STEREO B. The upper panel shows ions in the energy ranges of 102−110 keV (blue), 389−438 keV (green), and 1.98−2.22 MeV (black), the lower panel shows electron intensities in the range of 65−75 keV (blue), as well as the corresponding corrected electrons (red). The vertical line indicates the time of the shock passage over the spacecraft. The electrons show a clear spike-like increase at the shock.