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I. Conclusion: Characterizing hazards
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I. Conclusion: Characterizing hazards

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  • 1. CHARACTERIZING HAZARDS AND DISASTERS:• MAGNITUDE: size of the event measured on a scale• FREQUENCY: how often does a sizeable event occur• DURATION: length of time during which the event occurs• AREAL EXTENT: size of area affected, ranging from very localized to regional event• SPATIAL CONCENTRATION: distribution of hazard over space• SPEED OF ONSET: time difference between start and peak of event, from very rapid to very slow• REGULARITY (return period): some volcanoes, for example, have a very long return period. El Niño droughts are on a 3-5 year cycleCreate a diagram showing the relationship between magnitude and frequency, andbetween magnitude and return period
  • 2. CHARACTERISTICS OF NATURAL HAZARDS Tropical cyclones Droughts EarthquakesFREQUENCY Frequent RareDURATION Long ShortAREAL EXTENT Widespread LimitedSPATIAL Diffuse ConcentratedCONCENTRATIONSPEED OF ONSET Slow Fast Characterize the three natural hazards listed for each criteria