IAS (Admin.) Mains Geography Geomorphology-Vulcanicity Study Material (Page 3 of 6)
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Vulcanicity: Devastations Due to Volcanoes, Benefits from Volcanoes
Devastations Due to Volcanoes
Volcanoes cause large loss of life and property.
- Primary hazards include pyroclastic flows, air-fall tephra, lava flows, and volcanic gases.
- Secondary hazards include ground deformation, lahars (mudflows) , landslides, and possibly tsunamis in ocean floor volcanic eruptions.
- They cause air pollution and volcanic smog or vog. The constituent and harms of vog are same as that of smog (discussed in “Environmental Geography” ) .
- Crop and soil damage due to lava flow, mudflow, and ashes.
- Sulphur fumes rot metal structures.
Benefits from Volcanoes
- Volcanoes gene…
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Vulcanicity: Distribution of Volcanoes, Major Volcanoes
Distribution of Volcanoes
Volcanoes occur along weaker zone of earth crust. 15% volcanoes lie along constructive or divergent plate margin, and 80% volcanoes lie along destructive or convergent margins.
- Intraplate Region: These include the volcanoes along Hawaii Island and fault zone of East Africa. These are active in middle of continental plates and were fo…
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