About Balbi
Balbi is a stratovolcano rising to 2,715 meters (8,908 feet) in Papua New Guinea's Southwestern Pacific Volcanic Regions. No historical eruptions have been recorded, though the volcano is classified based on geological evidence of past activity. The volcano has produced 1 recorded eruption.
Geography & Climate
Balbi is located in Papua New Guinea, within the Bougainville Volcanic Arc of the broader Southwestern Pacific Volcanic Regions. Situated at 5.92° S, 155.00° E in the Southern Hemisphere, the volcano lies within a tropical climate zone. At 2,715 meters above sea level, Balbi rises above the surrounding terrain into montane or subalpine conditions. The elevation creates distinct ecological zones along its flanks, from forested lower slopes to exposed rocky terrain near the summit. The volcanic landform is characterized as a composite, which describes the physical shape and structure of the volcanic edifice as observed from the surface.
Geological Context
Balbi sits in a subduction zone, where one tectonic plate dives beneath another, creating intense heat and pressure that generates magma. Subduction zones are responsible for many of the world's most explosive volcanoes and deadliest eruptions. For communities in Papua New Guinea near Balbi, this tectonic setting means the volcano is capable of producing powerful explosive eruptions, pyroclastic flows, and lahars that can threaten populated areas within tens of kilometers of the summit. The dominant rock type is andesite / basaltic andesite, a dark, fine-grained volcanic rock that forms from rapidly cooling, low-viscosity lava. Basaltic eruptions tend to be less explosive and produce fluid lava flows that can travel long distances. While less immediately dangerous than explosive eruptions, basaltic lava flows can destroy structures and infrastructure in their path, and volcanic gases released during these eruptions can affect air quality over a wide area.
Eruption History Summary
Balbi has 1 recorded eruption in the geological database, spanning from 1825 CE to 1825 CE.
GVP Reference Summary
The complex andesitic Balbi stratovolcano on Bougainville Island includes a large number of coalesced cones and lava domes. Five well-preserved craters occupy a NW-SE-trending ridge north of the summit cone, which also contains a crater. Three large valleys with steep headwalls dissect the flanks. The age of the most recent eruption is not known precisely. An oral tradition of a major eruption during the 19th century is thought to be in error, but could refer to minor eruptive activity. Fumaroles are located within 600-m-wide Crater B and on its W flank.
— Smithsonian Institution, Global Volcanism Program
1 Recorded Eruption
| Year | VEI | Type | Area |
|---|---|---|---|
| 1825 | — | Uncertain Eruption | Crater B ? |
Real-Time Data
USGS Alert Level
Thermal Anomalies
Frequently Asked Questions About Balbi
Is Balbi an active volcano?+
Balbi is classified as active based on credible evidence of past eruptions. Although its last known eruption was in prehistoric times, volcanologists consider it capable of erupting again.
When did Balbi last erupt?+
The most recent recorded eruption of Balbi occurred in 1825 CE. The eruption was classified as a "Uncertain Eruption." Balbi has 1 recorded eruption in total.
How high is Balbi?+
Balbi has a summit elevation of 2,715 meters (8,908 feet) above sea level. At 2,715 meters, it is comparable in height to many significant mountain peaks and stands well above the tree line.
What type of volcano is Balbi?+
Balbi is classified as a Stratovolcano. Stratovolcanoes (also called composite volcanoes) are steep, conical volcanoes built up by many layers of hardened lava, tephra, and volcanic ash. They are among the most common and dangerous types, known for explosive eruptions.
Where is Balbi located?+
Balbi is located in Papua New Guinea, in the Southwestern Pacific Volcanic Regions. More specifically, it lies within the Bougainville Volcanic Arc. Its exact coordinates are -5.916° latitude, 155.001° longitude.
Is it safe to visit Balbi?+
Balbi can generally be visited, but as with any volcano, visitors should check local conditions and any advisory notices before traveling. Papua New Guinea may have specific regulations for accessing volcanic areas. Guided tours are often the safest and most informative way to experience a volcano.
