No latest activity reported for St. Andrew Strait.

Below is a summary of eruption dates and Volcanic Explosivity Indices (VEI).

The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title. Additional discussion of data sources can be found under Volcano Data Criteria.

Fisher N H, 1957. Melanesia. {Catalog of Active Volcanoes of the World and Solfatara Fields}, Rome: IAVCEI, 5: 1-105

Johnson R W, Davies R A, 1972. Volcanic geology of the St. Andrew Strait Islands, Bismarck Sea, Papua New Guinea. {Geol Surv Papua New Guinea, Note on Invest}, 72-002: 1-29

Katsui Y (ed), 1971. List of the World Active Volcanoes. {Volc Soc Japan draft ms}, (limited circulation), 160 p

Newhall C G, Dzurisin D, 1988. Historical unrest at large calderas of the world. {U S Geol Surv Bull}, 1855: 1108 p, 2 vol

Pain C F, 1981. Stratigraphy and chronology of volcanic-ash beds on Lou Island. {Geol Surv Papua New Guinea Mem}, 10: 221-226

Reynolds M A, Best J G, Johnson R W, 1980. 1953-57 eruption of Tuluman volcano: rhyolitic volcanic activity in the northern Bismarck Sea. {Geol Surv Papua New Guinea Mem}, 7: 1-44

The St. Andrew Strait volcano, located in the Admiralty Islands north of Papua New Guinea, consists of a series of overlapping Quaternary cones formed by rhyolitic lava flows and pyroclastic materials on Lou and Tuluman Islands. Volcanism is aligned on a curved arc extending through the 12-km-long Lou Island, which may represent an incipient caldera ring fracture. The historically active Tuluman Islands, 1.5 km south of Lou Island, were formed during a 1953-1957 eruption. Pam Lin and Pam Mandian Islands farther to the SE along the same arc contain fresh rhyolitic obsidian similar to that found on Tuluman.