No latest activity reported for Qualibou.

Below is a summary of eruption dates and Volcanic Explosivity Indices (VEI).

The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title. Additional discussion of data sources can be found under Volcano Data Criteria.

Deplus C, Le Friant A, Boudon G, Komorowski J-C, Villemant B, Harford C, Segoufin J, Cheminee J-L, 2001. Submarine evidence for large-scale debris avalanches in the Lesser Antilles arc. {Earth Planet Sci Lett}, 192: 145-157

Lindsay J M, 2005. Saint Lucia. {In}: Lindsay J M, Robertson R E A, Shepherd J B, Ali S (eds). {Volcanic Hazard Atlas of the Lesser Antilles}, Trinidad and Tobago, Seismic Res Unit, Univ West Indies, p 218-238

Robson G R, Tomblin J, 1966. West Indies. {Catalog of Active Volcanoes of the World and Solfatara Fields}, Rome: IAVCEI, 20: 1-56

Roobol M J, Wright J V, Smith A L, 1983. Calderas of gravity-slide structures in the Lesser Antilles Island Arc?. {J Volc Geotherm Res}, 19: 121-134

Samper A, Quidelleur X, Boudon G, Le Friant A, Komorowski J C, 2008. Radiometric dating of three large volume flank collapses in the Lesser Antilles arc. {J Volc Geotherm Res}, 176: 485-492

Shepherd J B, 2001. Volcanoes of the eastern Caribbean: past activity and future hazards. Paper presented at the Workshop on Volcanic and Seismic Hazards in the eastern Caribbean, May 28- June 1, 2001, 57 p

Wohletz K, Heiken G, Ander M, Goff F, Vuataz F-D, Wadge G, 1986. The Qualibu caldera, St. Lucia, West Indies. {J Volc Geotherm Res}, 27: 77-117

The Qualibou caldera on the SW side of St. Lucia provides the setting for the Pitons, two steep-sided pre-caldera lava domes that form one of the scenic highlights of the West Indies. The 3.5 x 5-km-wide Qualibou caldera formed about 32-39,000 years ago in conjunction with the eruption of the Choiseul Tuff. A larger depression has been interpreted to have formed by edifice collapse, and bathymetry has identified large submarine debris-avalanche deposits off the west coast of the island. This depression and associated volcanic vents and geothermal areas is also known as the Soufrière volcanic centre. Numerous resurgent post-caldera lava domes fill the caldera floor. The latest dated magmatic eruptions took place about 20,000 years ago, but younger undated lava domes and explosion craters are present. The only known Holocene eruptive activity was a minor phreatic eruption in the Sulfur Springs geothermal area in 1766 AD that ejected a thin ash layer over a wide area. A volcanic earthquake swarm centered 6 km ESE of the caldera occurred in 1990.