Fig. 17

Performance indicators for Borcherdt factors prediction models based on the reduction in the standard deviation of residuals RSm for various site proxies (different curves) for RP–RF (a, top), NP–RF (b, middle), and TP–RF (c, bottom). The left column (1) corresponds to \(F_{a}\) models, and the right one (2) corresponds to \(F_{v}\) models. The display is similar to that presented in Fig. 13