Flux-correlated amplitudes of common modes. The upper and lower panels correspond to the results of OB12 and OB13, respectively. Left panels: comparison between the common-mode amplitudes and flux response curves. Right panels: correlation between the common-mode amplitudes and binned flux responses. The blue dashed lines are linear regression models. The Pearson correlation coefficient is denoted as r. The flux response curves were arbitrarily rescaled for clarity but would not affect the correlation.