Lolobau

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Lolobau volcano

caldera 858 m / 2,815 ft
New Britain Island, Papua New Guinea, -4.92°S / 151.16°E
Current status: dormant (1 out of 5)

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Typical eruption style: explosive
Lolobau volcano eruptions: 1911-12 (Sili), 1908?, 1904-05 (Sili Malo or summit?), 1100 ± 30 years (Hulu)
Last earthquakes nearby: No recent earthquakes

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Location

Lolobau volcano forms an island 6.5 km off the coast of New Britain. The island measures 13.7 km long (east-west) and 9.7 km wide (north-south) and is formed by a 6 km wide caldera containing the small lake Naoi, and a younger stratovolcano, Mt Lolobau.
Several vents within the caldera lies along an E-W-trending line on the eastern flank of Mount Lolobau and have been active during historical time. The latest eruptions took place during the early-20th century from vents on Lolobau's east flank inside the caldera. Fumarolic activity decreased between 1937 and 1950.

Background:

The young cones inside the caldera include Giwu Peak, Sili (Siwi), Malo, Tiwongo and Tobal. The small 30 m high Hulu lava dome caps Mount Lolobau, which has a 0.8 x 1.1 km summit crater breached to the NE.

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