Essay Hazards And Hazards Of Volcanoes

1681 Words Nov 24th, 2015 null Page
A hazard is defined as a potential danger or a risk and in reference to volcanoes it means that the volcanoes that are most active have the highest levels of hazards. They are hazardous because they threaten lives and livelihoods as well as destroying fertile land, homes and buildings. People can contribute to the hazard by building on land that is particularly susceptible to eruptions as well as not being educated on the hazards and dangers leading them to not being able to evacuate the area. However each individual volcano erupts differently meaning that hazards are different for each eruption.

The location of a volcano is also a large variable in determining the nature of its eruptions. Volcanoes are generally found in three locations: constructive and destructive plate boundaries, as well as hotspots. The most explosive and potentially the most hazardous volcanoes are found on destructive/convergent plate boundaries like Mt Etna. Here, one plate subducts beneath the other generating intense heat and pressure, melting the rock and sediment to form a magma chamber. This viscous magma is resistant to flow and therefore results in violent eruptions involving pyroclastics and ash; potentially hazardous both locally and globally.
Between the years 1995-2001 of unusually intense activity at the four summit craters of Etna, the volcano produced its first flank eruption since 1991-1993 in July/August 2001. This eruption, which involved activity from seven distinct eruptive…

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