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,
Exclusion zone Hills volcano started erupting in 1995 and has continued erupting since. It encompasses the south part of the island, accounting for over half of its land mass and most areas of the island which were populated before the volcano erupted. The volcano destroyed the island's urban center and capital Plymouth, as well as many other villages and neighborhoods. The zone is now strictly enforced; entry into most of the destroyed areas is prohibited, while some areas are subject to restrictions during volcanic activity or open only as a "daytime entry zone". Exclusion zones are commonly used in the construction industry