GEOG 1350 Lecture Notes - Lecture 1: Subduction, Water Cycle, Supercontinent

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Hazards affect millions of people around the world each year. Within north america every location is at risk from at least one hazardous process. Examples: west coast: earthquakes, landslides, east coast: hurricanes, mid-continent: tornados, blizzards, all areas: drought. Natural hazards can arise from 3 main processes: Internal forces within the earth: driven by the internal energy of the earth (tectonic plates, external forces on the earth"s surface, driven by the suns energy (atmospheric effects, gravitational attraction, driven by the force of gravity (downslope movement) Natural hazard: a natural process that poses a potential threat to people and property. Risk: the probability of an event occurring multiplied by the impact on people and property. Disaster: a brief event that causes great damage or loss of life. Natural hazards differ in their potential to cause a catastrophe based on the size of the area of effect. More likely to be catastrophic: earthquakes, tsunamis, hurricanes.

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