Case study; mount helens

• Earthquake


  The March 27, 1980, earthquake caused the north face of Mount St. Helens to collapse, releasing pressure and leading to the eruption.
• Magma mix


  The mixture of hot magma and cold ground water produced a large amount of steam, contributing to the massive explosion.
• Gases and magma in Mount St. Helens

  A combination of highly porous and permeable rock, magma accumulation, and pressure buildup contributed to the eruption.
• Short term responses

  It was monitered so people could evacuated before it erupted

  Provide jobs to people to remove ash

  Electricity was restored
• long term response 


  trees were replanted

  farmers were given compensation for their loses

  money was given to rebuild buildings and transport routes

  tourist facilites were built to accomdate tourists
• death toll


  61 people and 7,000 plus animals