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Space Shuttle photo STS056-0085-0029. Looking west on April, 12, 1993.
Biliran (right center) is a compound volcano that makes a large mountainous island just north of the island of Leyte (left center to center). The large island of Samar is in the bottom right. Biliran's single historic eruption was from a flank vent in 1939. There are five solfatara fields on the island. The solfatara on the west side of Mt. Guinon contained more than 400 tones of sulfur in 1880.
Sources of Information:
Becker, G.F., 1901, Report on the geology of the Philippine Islands: U'S' Geol. Survey, 1899-1900: 21st Ann. Rept., Part 3, Washington 1901, p. 530-531.
Neumann van Padang, M., 1953, Philippine Islands and Cochin China. Catalogue of the Active Volcanoes of the World, International Association of Volcanology, 2, Rome, Italy, 49 p.
Simkin, T., and Siebert, L., 1994, Volcanoes of the World: Geoscience Press, Tucson, Arizona, 349 p.