Fig. 37
From: Earth-affecting solar transients: a review of progresses in solar cycle 24
Examples of magnetic metrics applied to major flares/CMEs. Panel (a): the integral of the shear angle along the PILs versus the gradient-weighted integral length of the PILs for 56 bipolar and multipolar ARs. The darker crosses correspond to ARs which gave rise to a CME within the 72 hr search window from the corresponding measurement whereas the lighter crosses correspond to those ARs without a CME with the same search window. From Falconer et al. (2008). Panel (b): fraction of ARs with an M- or X-class flare as a function of R, within a 24-hour window from the R recording. 2500 ARs were employed. From Schrijver (2007). Panel (c): ARs giving rise to M- or X-class flares (blue and red symbols) and non-flaring ARs (black symbols) versus their peak Beff in a 24-hour search window. 298 ARs were employed. From Georgoulis and Rust (2007)