The 1799 Vendée earthquake (French: Séisme de 1799 dans le Marais breton-vendéen) or Bouin earthquake was a magnitude 6.4 earthquake that struck the region on 25 January 1799 (6 Pluviôse of year VII in the French Republican calendar) with aftershocks on the following days. Its epicenter was located at a depth of 24 km in the Bay of Bourgneuf at the level of the island of Bouin. Shocks of intensity VII–VIII were felt throughout the west of France.