Space Shuttle photo STS068-0241-0042 taken on October 1, 1994. Looking west across the southern Batan islands, about 120 miles (200 km) north of Luzon. Iraya forms the north (right) end of Batan, the largest island.
Map from van Padang (1953).
Sources of Information:
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.