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GEOG1011:LandscapesandWater,fall2005AdinaRacoviteanuObjectivesWhydoearthquakesoccur?Wheredoearthquakesoccur:definitionsSeismicwaves:formsSeismicwaves:propertiesMeasuringearthquakesLocatingtheshakingEarthquakesize:twowaystomeasure2)Intensity:MercalliScale:Whatdidyoufeel?Assignsanintensityorratingtomeasureanearthquakeataparticularlocation(qualitative)I(notfelt)toXII(buildingsnearlydestroyed)MeasuresthedestructiveeffectIntensityisafunctionof:EnergyreleasedbyfaultGeologyofthelocationSurfacesubstrate:canmagnifyshockwavese.g.MexicoCity(1985)andSanFrancisco(1989)FrequencyofOccurrenceofEarthquakesRecentEarthquakeActivityintheWorldLargestearthquakeintheworldMostDestructiveKnownEarthquakesonRecordintheWorldEarthquakedamageEarthquakesandtheSanAndreasFaultLandslides:May30,1970PerudisasterThetownofHuarazflattenedIndia,GujaratearthquakeJan26,2001Jun23,2001S.PeruearthquakeEarthquakeriskandpredictionShort-termpredictionsImpactsofEarthquakePrediction
