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There are no activity reports for Umboi.
There are no Holocene eruptions known for Umboi. If this volcano has had large eruptions prior to 10,000 years ago, information might be found in the LaMEVE (Large Magnitude Explosive Volcanic Eruptions) database, a part of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
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, Taylor G A M, Davies R A, 1972. Geology and petrology of Quaternary volcanic islands off the north coast of New Guinea. Aust Bur Min Resour Geol Geophys Rec, 1972/21: 1-127.
Lowenstein P L, 1982. Problems of volcanic hazards in Papua New Guinea. Geol Surv Papua New Guinea Rpt, 82/7: 1-62.
Umboi Island, 50 km in its longest dimension, is the largest of the volcanic islands off the north coast of New Guinea. Dominantly basaltic-andesitic Umboi is comprised of several coalescing stratovolcanoes that are cut by a large 13 x 17 km caldera whose walls rise up to 1 km above its floor. The caldera is widely breached to the sea on the NE side and contains three youthful post-caldera cones with summit crater lakes, Talo, Soal, and Barik. The largest of these cones, 1494-m-high Talo, displays several thermal areas and has satellitic cones on its flanks. No historical eruptions have been reported at Umboi, but activity of the post-caldera cones is thought to have continued until the last few hundred years (Johnson et al., 1972).