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Umboi Island

Umboi

Complex volcano · Papua New Guinea · 1335m

The 50-km-long island of Umboi, the largest of the volcanic islands off the north coast of New Guinea, is seen in this Space Shuttle image (N is to the top-right). A large 13 x 17 km caldera is visible in the northern half of the island and is breached to the NE (top center). Three post-caldera cones with summit crater lakes (left center) are visible on the smooth-surfaced caldera floor. The large eroded massif (right center) is an older volcanic complex, as is the dissected northern tip of the island (upper left).
The 50-km-long island of Umboi, the largest of the volcanic islands off the north coast of New Guinea, is seen in this Space Shuttle image (N is to the top-right). A large 13 x 17 km caldera is visible in the northern half of the island and is breached to the NE (top center). Three post-caldera cones with summit crater lakes (left center) are visible on the smooth-surfaced caldera floor. The large eroded massif (right center) is an older volcanic complex, as is the dissected northern tip of the island (upper left). · Photo: NASA Space Shuttle image STS50-99-748-47, 2000 (http://eol.jsc.nasa.gov/). · Wikimedia Commons
Type
Complex volcano
Country
Papua New Guinea
Region
Southwestern Pacific Volcanic Regions / Bismarck Volcanic Arc
Elevation
1335m
Coordinates
-5.592, 147.892
Last eruption
Unknown
Tectonic setting
Subduction zone / Continental crust (> 25 km)
Landform
Composite
Major rock type
Basalt / Picro-Basalt
Geological summary

Umboi Island, 50 km in its longest dimension, is the largest of the volcanic islands off the N coast of New Guinea. Dominantly basaltic-andesitic, it is comprised of several coalescing stratovolcanoes cut by a 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. Talo, displays several thermal areas and has satellitic cones on its flanks. No historical eruptions have been reported, but activity of the post-caldera cones is thought to have continued until the last few hundred years (Johnson et al., 1972).

From Wikipedia

Umboi is a volcanic island between the mainland of Papua New Guinea and the island of New Britain. It is separated from New Britain by the Dampier Strait, and Huon Peninsula and New Guinea by the Vitiaz Strait. It has an elevation of 1,335 metres.

Wikipedia · CC BY-SA · Read full article →

Eruption history

Detailed timeline

No eruption records available.

External links

⚠ For reference only. Not for emergency response.