12 July 2012 event of a CME and the associated SEP. The plot shows the CME speed from STEREO (dashed line), Mach number (dotted line), and SEP flux in the >10 MeV energy band (red line) vs time. The Mach number has been scaled by (100) to match the plot. The CME peak velocity, SEP peak flux, velocity of the CME at the SEP peak flux, and Mach number at the SEP peak flux and at the CME peak velocity are shown as crosses for reference (blue, black, red, green, and orange, respectively). The onset and final values of Mach number (M_onset, M_final) and distance from the Sun [in units R_sun] (R_onset, R_final) are shown in the figure.