FMHex20: An earthquake focal mechanism database for seismotectonic analyses in metropolitan France and bordering regions

We present a compilation of over 1700 focal mechanisms for nearly 1300 earthquakes in metropolitan France and bordering regions Western Europe. It is based on both published unpublished sources (articles, reports, observatory websites) which the mechanism solutions have been verified internal consistency, corrected cases minor errors rejected major inconsistencies between parameters. The database, labeled FMHex20, first version should be regularly updated future as part an ongoing effort within Seismicity Transverse Action French Résif research infrastructure. also first-order seismotectonic analyses whole two (Western Northern Alps-Jura-Vosges) to illustrate how FMHex20 database can serve basis geodynamic or seismic hazard zonation studies. Combined with complementary datasets, it improve our understanding kinematics potentially active faults, including very-low-strain-rate case most France.