Umboi
Complex in Papua New Guinea
Key Facts
Elevation
1,335 m (4,380 ft)
Type
Complex
Location
-5.592°, 147.892°
Region
Bismarck Volcanic Arc
Rock Type
Basalt / Picro-Basalt
Tectonic Setting
Subduction zone
Location
Loading map...
Overview
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).
Volcanic Hazards & Risk Assessment
Primary Hazards
Risk Level
Geological Composition & Structure
Rock Types
Tectonic Setting
Age & Formation
Eruption Statistics & Analysis
| Metric | Value | Global Ranking | Significance |
|---|---|---|---|
| Total Recorded Eruptions | Unknown | Low | Moderately active volcano |
| Maximum VEI | VEI Unknown | Minor | Local impact potential |
| Recent Activity | Unknown | Historical | Historically active |
Monitoring & Alert Status
Monitoring Networks
Current Status
Nearby Volcanoes in Southwestern Pacific Volcanic Regions
Quick Info
- •Smithsonian ID: 251060
- •Evidence: Evidence Credible
- •Epoch: Holocene
About the Photo
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).
NASA Space Shuttle image STS50-99-748-47, 2000 (http://eol.jsc.nasa.gov/).
Authority Sources
Related Volcanoes
Basic Information
This page shows basic data from the Smithsonian Global Volcanism Program. For more detailed information, visit the official Smithsonian page.