About Boisa
Boisa is a stratovolcano rising to 205 meters (673 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.
Geography & Climate
Boisa is located in Papua New Guinea, within the Bismarck Volcanic Arc of the broader Southwestern Pacific Volcanic Regions. Situated at 3.99° S, 144.97° E in the Southern Hemisphere, the volcano lies within a tropical climate zone. At just 205 meters above sea level, Boisa is a relatively low-elevation volcanic feature. Despite its modest height, it remains an active geological formation with the same underlying magmatic processes as its taller counterparts. The volcanic landform is characterized as a composite, which describes the physical shape and structure of the volcanic edifice as observed from the surface.
GVP Reference Summary
The 1.4 x 1.7 km Boisa (or Aris) Island consists of a basaltic-andesitic cone with a summit crater open to the north whose rim extends to the island's east coast. The crater of the basaltic older cone is filled by two steep-sided andesitic lava domes. A third lava dome, separated from the eastern cone by a low saddle, forms a peninsula on the western side of the island. Although Gust and Johnson (1981) suggest that the last eruption "may have been quite recent" based on the visible island morphology, there is no thermal activity and no reports of activity or dated eruptions.
— Smithsonian Institution, Global Volcanism Program
0 Recorded Eruptions
No eruption records available for Boisa.
Real-Time Data
USGS Alert Level
Thermal Anomalies
Frequently Asked Questions About Boisa
Is Boisa an active volcano?+
Boisa is not currently classified as active. Its activity evidence is listed as "unknown." No recorded eruptions have been documented. However, no volcano is ever considered permanently extinct.
How high is Boisa?+
Boisa has a summit elevation of 205 meters (673 feet) above sea level. At 205 meters, it is a relatively low-elevation volcano.
What type of volcano is Boisa?+
Boisa 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 Boisa located?+
Boisa is located in Papua New Guinea, in the Southwestern Pacific Volcanic Regions. More specifically, it lies within the Bismarck Volcanic Arc. Its exact coordinates are -3.994° latitude, 144.966° longitude.
Is it safe to visit Boisa?+
Boisa 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.
