Montserrat[1]

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Montserrat[1]

  1. 1. Montserrat: Volcanic Eruption in an LEDC Revision notes
  2. 2. Montserrat <ul><li>Montserrat is a small island in the Caribbean and is 12 miles long and 7 miles wide. There is a volcanic area located in the south of the island, called Soufriere Hills. </li></ul><ul><li>The volcanic peak in this area is called Chances Peak, which had been dormant for over 300 years. Then in 1995, the volcano began to give off warning signs of an eruption (small earthquakes and eruptions of dust and ash). Once Chances Peak had woken up it then remained active for a period of 5 years. The most intense eruptions occurred in 1997. </li></ul><ul><li>It is known as the 'Emerald Island' and is mountainous with plenty of woodland. It has attracted many rich people to the island and was famous for rock stars recording there. </li></ul><ul><li>However much of the population are poor and rely on farming which is for their subsistence. Before the eruption of 1995, over 12,000 people lived on the island but less than 5000 do today </li></ul>
  3. 3. The Causes of the Montserrat Eruption <ul><li>Montserrat lies on a destructive plate boundary . The volcano is caused by subduction of the North American/Atlantic plate under the Caribbean plate. </li></ul><ul><li>As the two plates merge the oceanic plate is forced down or sub ducted under the continental plate. As it is forced down pressure increases which triggers earthquakes and at the same time heat produced by friction melts the descending crust to  form molten magma. The hot magma tries to rise to the surface and when it succeeds will form a volcano such as the one in Montserrat </li></ul>
  4. 4. The story of the eruptions <ul><li>1992 - The first Earthquake 1995 - The volcano erupts after being dormant for 500 years. </li></ul><ul><li>1996 - The volcano continued to erupt and became more violent causing increased damage. 1997 - Large eruptions continued with the dome collapsing and large pyroclastic flows affecting much of the island </li></ul>
  5. 5. Primary Effects of the Eruption <ul><li>2/3 of the island covered in ash </li></ul><ul><li>50% of population evacuated to the north of the island to makeshift shelters </li></ul><ul><li>23 people died in 1997 </li></ul><ul><li>The capital, Plymouth became a ghost town </li></ul><ul><li>Floods as valleys blocked with ash </li></ul><ul><li>Airport and port closed </li></ul><ul><li>Farmland destroyed </li></ul><ul><li>Forest fires caused by pyoclastic flows </li></ul><ul><li>Schools and hospitals destroyed </li></ul>
  6. 6. Secondary Effects of the Eruption <ul><li>As most of the southern area was destroyed any remaining inhabitants have had to endure harsh living conditions in the North. </li></ul><ul><li>Transport remains a problem for people travelling to the island as the port and airport remain closed. </li></ul><ul><li>The tourist industry is still suffering with few visitors except for cruise ships looking at the volcano </li></ul><ul><li>Over half the population left the island and have not returned </li></ul>
  7. 7. Responses to the Eruption <ul><li>£41 million was given in aid by the British Government. Money was given to individuals to help them move to other countries. </li></ul><ul><li>Riots occurred as locals complained that the British were not doing enough to help the island </li></ul><ul><li>The MVO (Montserrat Volcano Observatory) was set up to study the volcano and provide warnings for the future </li></ul><ul><li>A risk assessment was done to help islanders understand which areas are at risk and reduce problems for the future. </li></ul>

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