Relationship between structural inheritance and seismicity in metropolitan France. Solid and dashed green lines show major crustal faults and fault zones (MFZ: Midi Fault Zone; BF: Bray Fault; LRFS: Lower Rhine Fault System; SASZ: South Armorican shear Zone; SH: Sillon Houiller; NPF: North Pyrenees Fault; CF: Cévennes Fault; BF: Belledonne Fault; PFT: Pennic Front Thrust). Solid dashed lines show major sedimentary basins. Grey circles show historical and instrumental earthquakes (Mw ≥ 4.5, SHARE catalogue). Orange shading shows relative density of instrumental earthquakes (Mw ≥ 2.0, SI-Hex catalogue).