Soufrière Hills century in Montserrat. When pyroclastic flows and mudflows began occurring regularly, the capital, Plymouth, was evacuated, and a few weeks later a pyroclastic flow covered the city in several metres of debris. The first phreatic explosion in this new period of activity occurred on 21 August 1995, and such activity lasted for 18 weeks until it caused an andesitic lava dome formation. This was initially confined by a sector-collapse scar. This period lasted for another 60 weeks, after which there were major dome collapses and two periods of explosive volcanic eruptions and fountain-collapse pyroclastic flows. The explosion blanketed Plymouth, away,
Empedocles (volcano) sign of erupting in the near future. While the volcano's top is now 7 meters below sea level, it was once visible above the water. In 1831 Empedocles broke the surface as Graham Island (Ferdinandea) and almost caused a major international incident when several countries tried to claim ownership of it. It disappeared into the water again five months later. Empedocles (volcano) Empedocles is a large underwater volcano located 40 km off the southern coast of Sicily named after the Greek philosopher Empedocles who believed that everything on Earth was made up of the four elements. According to Italy's National