geography - eruptions

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  • predicting eruptions and preparations
    • hundreds of small earthquakes
      • seismometers detect earthquakes
    • temperature in volcano rises
      • thermal imaging techniques and satellite cameras detect heat
    • gases released - higher sulphur content = closer to eruption
      • gas samples taken and chemical sensors to measure sulphur levels
    • creating and exclusion zone
    • ready to evacuate
    • emergency supply of basic provisions e.g. food
    • funds available
    • good communication system set up


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