ERTH 2415 Midterm: Midterm 1-Review Notes.docx
8 Apr 2013
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Natural hazards: source of potential hazard that exists in the environment that have the potential to cause harm (eg rock slides) natural hazards vulnerability natural disaster. Vulnerability: likelihood that a community will suffer injuries, deaths or property damage from a hazardous event. Resilience: reduction in likelihood for community suffering by taking various steps (eg burying power lines) Frequency: number of occurrences of similar events per unit of time (eg caribbean storms affect. Return period: length of time between similar events (eg severe hurricanes occur in the us about every 6 years. ) Magnitude: amount of energy fuelling a natural disaster event (eg force of hurricane winds, or of an earthquake. ) Origin of the solar system: formation of solar nebulla. Weather realated going up (drought, flood etc: result of climate change, # of natural disaster fatalities increasing with time communities are more vulnerable (higher populations, degradation of ecosystems, over reliance on technology, economic losses rising.
