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Qualibou
View from Gros Piton over the Qualibou caldera
Highest point
Elevation	777 m (2,549 ft)
Coordinates	13°50′17″N 61°02′46″W / 13.838°N 61.046°W / 13.838; -61.046
Geography
QualibouSaint Lucia, Caribbean
Geology
Rock age	32,000–39,000 years
Mountain type	Caldera
Last eruption	1766

Qualibou, also known as the Soufrière Volcanic Center, is a 3.5 × 5 km-wide caldera on the island of Saint Lucia that formed between 32,000 and 39,000 years ago. This eruption also formed the Choiseul Tuff which covers the southeastern portion of the island.

The Pitons are two large lava domes that formed 200 to 300,000 years ago, before the formation of the caldera; ever since then, other domes have filled the caldera floor. There was a phreatic eruption in 1766 that deposited volcanic ash over a wide area.

Sulphur Springs is an active geothermal area located roughly in the center of the caldera.

In 1990, 1999 and 2000 there were shallow volcanic earthquakes located 6 km ESE of the caldera.

Gallery

• Sulphur Springs
• Petit Piton
• Soufrière and the Pitons

References

1. This elevation is for Gros Piton, however Morne Gimie on the edge of the caldera has an elevation of 950 m.
2. "Report on Qualibou (Saint Lucia)". Bulletin of the Global Volcanism Network. 15 (5). 1990. doi:10.5479/si.GVP.BGVN199005-360140.
3. The University of the West Indies Seismic Research Centre (www.uwiseismic.com). "St Lucia".

External links

• "Qualibou". Global Volcanism Program. Smithsonian Institution. Retrieved 2021-06-27.

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