Mount Ragang, also called Mount Piapayungan and Blue Mountain by the local people, is an active stratovolcano on Mindanao island in the Philippines. With an elevation of 2815 m, it is the seventh highest mountain in the Philippines and the highest point in the Lanao del Sur province.

Location

Mount Ragang is located in the southern part of Lanao del Sur in the Bangsamoro autonomous region.

Physical features

Ragang has an elevation of 2815 m and a base diameter of 32 km. It is the most active volcano on Mindanao, and is part of a string of volcanoes in what volcanologists call the Central Mindanao Arc. It is one of the active volcanoes in the Philippines, which are all part of the Pacific ring of fire.

Eruptions

There is still some confusion on the number of times Ragang has erupted. The Philippine Institute of Volcanology and Seismology lists eight eruptions, with the last one occurring in July 1916. However, the Smithsonian Institution's Global Volcanology Programs, citing the Catalog of Active Volcanoes of the World (Neumann van Padang, 1953), suggests that some eruptions attributed to nearby Makaturing were those of Ragang.