hazards - key terms 3.0 / 5 based on 1 rating ? GeographyNatural hazardsGCSEOCR Created by: 12afarmerCreated on: 15-09-16 15:34 Aftershocks smaller earthquakes that occur in the same general area during the days to years following a larger event 1 of 19 Plate Tectonics the study of the distribution and movement of the earths crustal plates 2 of 19 Fault a fracture in the earth's crust that shows signs of movement 3 of 19 Subduction Zone the area of a destructive plate boundary where on eplate descends below the other 4 of 19 Nuees Ardentes highly destructive, fast moving clouds of dust and ash 5 of 19 Shield Volcano a volcano that covers a large area with very gently sloping sides 6 of 19 Strato Volcano tall,conical volcanoes composed of many layers 7 of 19 Lahar a type of mudflow composed of pyroclastic material and water that flows down from a volcano, typically along a river valley 8 of 19 Pyroclastic Flows avalanches of hot volcanic debris 9 of 19 Geothermal energy generated by heat stored deep in the earth 10 of 19 GPS (Global Positioning System) a group of satellites that allow people to find out their exact location on the earth'e surface 11 of 19 Epicentre the point on the earth's surface directly above the focus of an earthquake 12 of 19 Seismic Waves vibration generated by an earthquake 13 of 19 Blind Fault one where the fault line does not reach the surface 14 of 19 Cyclone a system of winds rotating inwards to an area of low pressure 15 of 19 Hurricane a violent tropical storm i n the Caribbean region 16 of 19 Typhoon a violent tropical storm over the Indian and Pacific Oceans 17 of 19 El Nino large climatic disturbances in the southern Pacific Ocean that occur every 3-7 years 18 of 19 Desertification the degredation of landin aris and semi-arid areas resulting primarily from human activities and influenced by climatic variations 19 of 19
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