CHARACTERIZING HAZARDS AND DISASTERS:• MAGNITUDE: size of the event measured on a scale• FREQUENCY: how often does a sizea...
CHARACTERISTICS OF NATURAL HAZARDS                                Tropical cyclones Droughts       EarthquakesFREQUENCY   ...
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I. Conclusion: Characterizing hazards

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I. Conclusion: Characterizing hazards

  1. 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. 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

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