FMHex20 database for metropolitan France and neighboring regions. (a) Stereographic projections (lower hemisphere) of individual focal mechanisms. Symbol sizes are proportional to magnitudes. White dashed boxes show regional figures in Supplementary Material. (b) Grid-average faulting style. Blue (−1): normal, yellow (0): strike slip, red (1): reverse. Symbol sizes are inversely proportional to standard deviations s (large: σ ≤ 0.25, medium: 0.25 < σ ≤ 0.5, small: σ > 0.5). (c) and (d) Grid-average orientations of near-horizontal P (red) and T (blue) axes. Light-color fan shapes indicate standard deviations σ.