Montserrat is a British Overseas Territory located in the Caribbean. The island is located in the Leeward Islands, part of the chain of islands known as the Lesser Antilles, in the West Indies. Montserrat measures approximately 16 km long and 11 km wide, with approximately 40 kilometres of coastline. Montserrat is nicknamed The Emerald Isle of the Caribbean both for its resemblance to coastal Ireland and for the Irish ancestry of some of its inhabitants. On 18 July 1995, the previously dormant Soufrière Hills volcano, in the southern part of the island, became active. Eruptions destroyed Montserrat's Georgian era capital city of Plymouth and two-thirds of the island's population was forced to flee. The volcanic activity continues, currently mostly affecting the vicinity of Plymouth, including its docking facilities, and the eastern side of the island around the former W. H. Bramble Airport, the remnants of which were buried by flows from volcanic activity on 11 February 2010. An "exclusion zone" extending from the south coast of the island north to parts of the Belham Valley has been imposed because of the size of the existing volcanic dome and the resulting potential for pyroclastic activity. Visitors are generally not permitted entry into the exclusion zone, but an impressive view of the destruction of Plymouth can be seen from the top of Garibaldi Hill in Isles Bay. Relatively quiet since early 2010, the volcano continues to be closely monitored by the Montserrat Volcano Observatory.