Mount Biliran is a solfataric active complex volcano located in the island province of Biliran in the Philippines. The volcano caused the formation of the island. Geological features Rock Type: Hornblende andesite containing greenish and black hornblende Tectonic Setting: Biliran Volcano is part of the curvilinear belt of Quaternary volcanoes in eastern Philippines, parallel to Phil. Trench to the east Volcanic activity Number of Historical Eruptions: 1 Latest Eruption/Activity: September 26, 1939 Site: crater Eruption Character: Debris avalanche Affected Areas/Remarks: Ashfall at Caibiran and adjoining areas (6.35 cm thick deposits) Monitoring activity: Short-term monitoring in 1954 Physical features Hotsprings: Central Biliran – Libtong Thermal Areas (12 hot springs and one bubbling pool) North Biliran – Panamao Thermal Area Anas Thermal Area South Biliran – Kalambis Thermal Area Adjacent Volcanic Edifice: Panamao (107 m asl) Gumansan (1064 m asl) Lauan (1187 m asl) Suiro (1301 m asl) See also List of active volcanoes in the Philippines Philippine Institute of Volcanology and Seismology List of inactive volcanoes in the Philippines List of potentially active volcanoes in the Philippines References Topo Sheets: 3854 I, 3855 II, 3955 III, 3854 II, 3954 III. External links Philippine Institute of Volcanology and Seismology (PHIVOLCS) Biliran Page Biliran Island Landforms of Biliran Volcanoes of the Visayas Active volcanoes of the Philippines Complex volcanoes