Cross-correlations and scaling laws between various properties of flare-CME-type II events. (a) Spearman correlation matrix. Each cell provides the Spearmann cross-correlation coefficient (C_R, C) between the respective row (R) and column (C) parameters. The cell color represents the p value. The C_R, C, error, and p-value were found using a Bootstrapping analysis. The “very significant” (p < 0.015), “significant” (p < 0.05), and “insignificant” (p > 0.05) C_R, C values are shown in green, white, and red text, respectively. The C_R, C between the novel composite metrics and the respective dependent parameters are masked and marked by “–”. (b) The P_flare − P_CME scaling law. (c–d) Relations connecting ϕ_rec and V_CME to P_CME. Shaded regions represent the fitting uncertainty intervals.