Geologic Background:
This little-known volcano is one of several
major calderas on the island of New Britain. The 10 x 12
km Hargy caldera, whose floor is 150 m above sea level,
contains an inner caldera with a steep west-facing wall.
A caldera lake on the SW side drains through a narrow gap
in the northern caldera wall. The latest caldera-forming
eruption of Hargy volcano took place about 11,000 years
ago. The Galloseulo lava cone rises above and partially
overtops the western rim of the caldera. A double crater
occupies a larger 700-m-wide crater. Regular small
eruptions have taken place at Galloseulo over the past
7,000 years, the last occuring about 1,000 years ago.
Gallosuelo is located within the west rim of a roughly
12-km-diameter caldera, partly filled by Lake Gargy. The
700-m-diameter main crater contains a secondary, more
recent crater.
Historic Activity:
- The volcano has had no known eruptions during
historic time.
Recent Activity:
Data Sources:
- Global Volcanism Network (V. 15, No. 10)
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