More than 2,000 volcanoes exist in the Andes, mainly in the countries of Argentina, Bolivia, Chile, Colombia, Ecuador and Peru. Among these is Nevado del Ruiz, which erupted in 1985 in Colombia. Seven volcanoes have been active in Peru since the arrival of the Spaniards, but volcanic activity is typically poorly recorded in Peru, owing to the remote nature of the region and the scarce population.