ForeCAT spreads at 20 R_⊙ in (a) latitude, (b) longitude, and (c) tilt. Events are listed on the x-axis with four columns for each event corresponding to the four magnetograms used, from left to right: HMI Synchronic, HMI Synoptic, GONG Zero, and GONG ADAPT. The columns are color-coded according to the PFSS source surface height and the deflection/rotation values are normalized according to the OSPREI “standard” setup of HMI Synchronic with R_ss = 2.5 R_⊙ for each event (represented as a black scatter point).