Loloru
Compound in Papua New Guinea
Key Facts
Elevation
1,887 m (6,191 ft)
Type
Compound
Location
-6.520°, 155.620°
Region
Bougainville Volcanic Arc
Rock Type
Andesite / Basaltic Andesite
Tectonic Setting
Subduction zone
Location
Loading map...
Overview
Loloru, the SE-most volcano on Bougainville Island, is the source of a broad ignimbrite apron that covers much of the southern part of the island. The summit consists of two nested calderas, and a forested andesitic lava dome that restricts a crescent-shaped lake to the eastern side of the younger caldera. The smooth flanks of the pyroclastic shield are dissected by radiating deep valleys.
A pristine lava flow occurs on the SE flank. Loloru is constructed within the 10 x 15 km Pleistocene Laluai caldera. The topographically higher Taroka group of volcanoes to the NW and the Takuan group to the north also were constructed within the caldera and deflected the bulk of Loloru ignimbrites to the south.
The most recent of several major Holocene explosive eruptions took place about 3,000 years ago.
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 | 3076 years ago | Historical | Historically active |
Monitoring & Alert Status
Monitoring Networks
Current Status
Nearby Volcanoes in Southwestern Pacific Volcanic Regions
Quick Info
- •Smithsonian ID: 255030
- •Evidence: Eruption Dated
- •Epoch: Holocene
About the Photo
The summit of Loloru on SE Bougainville Island has two nested calderas and forested lava dome within the younger one. Loloru is constructed within the 10 x 15 km Pleistocene Laluai caldera; part of the rim of this outer caldera is seen at the lower right. Pyroclastic flow deposits from the volcano cover much of the southern part of the island. The most recent of several major Holocene explosive eruptions took place about 3,000 years ago.
Photo by Wally Johnson, 1988 (Australia Bureau of Mineral Resources).
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.