Mt Etna 0.0 / 5 ? GeographyPlate tectonicsA2/A-levelAll boards Created by: nicolarose1Created on: 13-04-17 17:49 Location? near Catania, Sicily 1 of 13 Dates of eruptions? 1991-1993 2 of 13 plate margin? destructive 3 of 13 Type of volcano? stratovolcano 4 of 13 Most prominent feature? Valle del Bove, horseshoe-shaped caldera 5 of 13 What happened at the end 1991? lava began to advance of the settlement of Zafferana 6 of 13 First protective measure? large earth barrier across the end of the Val Calanna 7 of 13 what did this do? slowed lava advance temporarily 8 of 13 How did they attempt to cut off flow? by dropping concrete blocks from helicopters to block the primary feeder channel 9 of 13 what happened in May 1992? encouraged a new direction of flow by blasting openings in the lava tube - the lava stopped advancing on Zafferana 10 of 13 Deaths? None 11 of 13 Two reasons for success? low effusion rates during the eruption, possibility of diverting lava flow, lava flow was slow so easier to manage 12 of 13 Why were the slopes an attractive place to live? fertile soils 13 of 13
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