Mt Etna

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  • Created by: L. P.
  • Created on: 31-05-13 12:05
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  • Mt Etna-  1991-93
    • Thousands live on the slopes of the volcano and in the surrounding areas
      • Fertile volcanic soils
    • End of 91, lava began to pour from vents
    • Protective measures
      • Large earth barriers, which held back the lava for a few months
        • Spring '92. Lava split over barrier, small barriers then built
          • Split over the barriers and destroyed orchards and small buildings
          • Concrete blocks dropped from helicopters through upper lava tube to block primary feeder channel
            • May '92, engineers blasted openings in the lava tube. Create a new direction of flow.
              • Protective measures
                • Large earth barriers, which held back the lava for a few months
                  • Spring '92. Lava split over barrier, small barriers then built
                    • Split over the barriers and destroyed orchards and small buildings
                    • Concrete blocks dropped from helicopters through upper lava tube to block primary feeder channel
                      • May '92, engineers blasted openings in the lava tube. Create a new direction of flow.
      • Schemes of success
        • Low effusion rates during the eruption
          • High elevation of the eruption vents
            • Lava flow had to travel more than 8km before it became a serious threat
              • Possibility of diverting the lava flow into uninhabited areas
                • Schemes of success
                  • Low effusion rates during the eruption
                    • High elevation of the eruption vents
                      • Lava flow had to travel more than 8km before it became a serious threat
                        • Possibility of diverting the lava flow into uninhabited areas

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