Soufriere Hills: A Deep Dive into the Volcano That Buried a Capital
The small Caribbean island of Montserrat was transformed forever when its Soufriere Hills volcano roared back to life in 1995 after centuries of quiet. Over the years that followed, a growing lava dome and its repeated collapses generated pyroclastic flows that buried the capital city of Plymouth, rendered much of the island uninhabitable, and forced thousands of residents to flee. The eruption became one of the most closely studied dome-building events in the history of volcanology.
A British island in the Lesser Antilles
Montserrat is a small British Overseas Territory in the Lesser Antilles, part of the volcanic arc that curves through the eastern Caribbean. The Soufriere Hills volcano, reaching a little over 900 metres before the eruption reshaped it, occupies the southern part of the island. For centuries it had shown no eruptive activity, and the island's capital and main settlements had grown around its flanks.
The 1995 reawakening
In July 1995, after a period of increasing earthquakes and steam emissions, the Soufriere Hills volcano began to erupt. Magma rose to the surface and started to build a lava dome, beginning a prolonged and dangerous eruption. As the dome grew, it became unstable, and its collapses sent pyroclastic flows down the volcano's flanks, increasingly threatening the populated areas below.
The burial of Plymouth
The capital city of Plymouth, which lay close to the volcano, was directly in the path of the eruption's pyroclastic flows and lahars. Over time it was buried under metres of volcanic deposits and abandoned, becoming a modern ghost town entombed in ash and mud. The loss of the capital is one of the most striking examples of a city destroyed by a volcano in modern times.
Evacuation and exodus
The eruption forced the evacuation of the southern two-thirds of Montserrat, declared an exclusion zone. Much of the island's population left altogether, relocating to the safer north or emigrating, and the island's population fell dramatically. Those who remained rebuilt their lives in the north, while the south, including Plymouth and the former airport, was left buried and off-limits.
A laboratory for dome eruptions
The Soufriere Hills eruption became one of the best-documented dome-building eruptions ever studied. Scientists at the dedicated Montserrat Volcano Observatory tracked the dome's growth, collapse, and the generation of pyroclastic flows in detail over many years. The knowledge gained has greatly advanced the understanding of how lava domes behave and how their hazards can be forecast.
Living with a long eruption
Montserrat's experience illustrates the challenge of living with a long-lasting volcanic eruption. Years of dome growth, collapse, and renewed activity required ongoing evacuation, exclusion zones, and adaptation. The island's people have shown remarkable resilience, rebuilding their community in the north while the volcano continued its slow, dangerous work in the south.
Monitoring an active dome
The Montserrat Volcano Observatory remains central to life on the island, continuously monitoring the Soufriere Hills volcano and advising on the exclusion zones and safety. The observatory's work is a model of sustained volcano monitoring in a populated setting, providing the information needed to protect the remaining population from a still-restless volcano.
Explore on the map
The Soufriere Hills volcano stands among the volcanoes of the eastern Caribbean, alongside La Soufriere on St Vincent and others in the Lesser Antilles arc. Explore it on the interactive map — filter by region to see Montserrat among the Caribbean volcanoes and to appreciate the hazards of dome-building eruptions.