El Forn

El Forn (Catalan pronunciation: [el ˈfoɾn]), also known as El Forn de Canillo, is a hamlet in Andorra, located in the parish of Canillo. It is particularly significant as the site of the El Forn landslide, the largest active deep-seated landslide in the Pyrenees. This geological feature consists mainly of Silurian black shales within its shear band and has been extensively studied due to its slow but continuous movement, which causes visible damage to local infrastructure. The landslide's complex history spans at least 30,000 years and is closely linked to glacial activity in the Valira d'Orient valley, with three major sliding events identified through geological analysis and radiocarbon dating. Due to potential impacts on nearby villages, comprehensive monitoring systems including boreholes, inclinometers, and radar interferometry have been implemented to assess risks and develop early-warning strategies.