ERTH 2415 Lecture Notes - Lecture 1: Natural Disaster, Natural Hazard, Lightning
19 Jan 2017
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Document Summary
Natural disasters: a natural event in which a large amount of energy is realeased in a short period of time, inflicting catastrophic consequences on life and infrastructure in the surrounding area. Most people are of the opinion that natural disasters are only the fault of nature, however it often occurs when society ignores natural hazards. Natural hazards: a source of danger that exists in the environment and can potentially cause harm. Example: unstable snow/rock on mountain slope, lightning. Vulnerability: the likelihood that a community will suffer (fatalities/physical damage) Strong winds, ice rain and cold temps= natural hazards. Pop without electricity for heating= death from hypothermia= natural disaster. Natural hazards are inevitable, but natural disasters aren"t . When the earth"s natural processes concentrate and suddenly release energy. They are grouped according to sources of energy. Forces of attraction between m1 and m2 serperated by r.
