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Volcano Case Studies - Coggle Diagram

- - - - tremors increase by several hundred a day
      - steam immissian increased
      - sulphur dioxyde began to escape
      - small bulges noticed
      - all signs magma was rising and pressure building
    - - delayed a state of emergancy
      - evacuated people in a 20 km radius
      - 15,000 people evacuated from a US air base
  - - - large volumes of magam reached the surface and erupted violenly
      - lava flowed down
      - rainfall turned dry materials into lahar
      - acidic lava with gas erupted with extreme violence
      - ash cloud rose 45km
      - phyrolastic flow
      - typhoon at the same time as PF
      - flowed down through the valley
      - inside became practically empty
      - caldera - more than 2km wide
      - eruption lasted form more than 9 hours
      - several weaker eruptions happened over the following months as began to build new cones in caldera
  - - - caused global temp rise by 0.5c
      - temp affected for 3 years
      - some gas destroyed ozone layer
      - wide scale folding form the ash and lahar sedements blocking valleys
    - - 800 died
      - thousands lives ricked
      - some of the deaths caused by primary effects some caused by camps
      - homeless camps had diseases and killed
      - 2 million effected
      - 1.2 million became homeless - had to live in camps and shan't towns in Manila
    - - negative
        
        sugar cane and rice production ceased
        
        100 million spent on aircraft damage
        
        250 million spent on property damage
        
        effected air traffic
        
        650,000 lost their jobs due to destroyed farm land
      - positive
        
        provided locals with jobs
        
        became a major tourist attraction