Period showing BDE observed by STEREO-B on May 2014 during the transit of an ICME. From top to bottom: SW proton speed, proton density, proton temperature, IMF magnitude accompanied by its polarity (red, negative; green, positive; yellow, ambiguous), IMF azimuthal angle in the RTN coordinate system complemented with the two possible nominal Parker spiral angles (red, negative; green, positive) calculated from the proton speed, IMF latitudinal angle in the RTN coordinate system, RTN magnetic field separated components, plasma β, γ (ripple; see Sect. 3.1), S/N₂₄ (see Sect. 3.1), and 119–194 eV suprathermal electron PAD colour-mesh (y-axis is the angle in degrees, z-axis the VDF in logarithmic scale). The vertical green dashed line indicates the interplanetary shock catalogued in the Shock list, the green shaded area corresponds to the magnetic obstacle as stated in the ICME list.