GMPV
Geochemistry, Mineralogy, Petrology & Volcanology

#Phreatic

Hydrothermal alteration in volcanic settings: Remaining research challenges

September 17, 2026
Tajogaite Volcano from the 2021 Eruption of La Palma
Tajogaite Volcano from the 2021 Eruption of La Palma. Taken by: Louis-Alexandre Lobanov. Source:imaggeo.eu.

Why should you care about hydrothermal alteration in volcanic systems? When people think of volcanoes, they imagine large, devastating eruptions and lava streams gushing from the summit of an edifice. However, even when volcanoes are not visibly ‘active’, there can be more lurking below the surface.  Hydrothermal alteration is one of the important and often less-talked-about culprits t ...[Read More]

La Soufrière de Guadeloupe: Past Eruptions and Ongoing Activity

September 13, 2024
La Soufrière de Guadeloupe: Past Eruptions and Ongoing Activity
La Soufrière on a clear day. The fumes coming out of the volcano are from Cratère Sud Centrale (the focus of the most degassing on the volcanic dome). We can also see numerous scars decorating its flanks (source: the website Parc national de Guadeloupe).

La Soufrière de Guadeloupe is an andesitic stratovolcano located in the southern part of Basse-Terre, within the Guadeloupe archipelago (Eastern Caribbean). It towers over the towns of Sainte-Claude and Basse-Terre. Nearly 50 years ago, this region faced severe consequences from a phreatomagmatic eruption, forcing the evacuation of 80,000 people. Since then, the volcano has been regularly monitore ...[Read More]