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1、www.enteacher.cn我的教师网NaturaldisasterAnaturaldisasteristheeffectofanaturalhazard(e.g.flood,volcaniceruption,earthquake,orlandslide)thataffectstheenvironment,andleadstofinancial,environmentalorhumanlosses.Theresultinglossdependsonthecapacityofthepopulationtos
2、upportorresistthedisaster,andtheirresilience.[1]Thisunderstandingisconcentratedintheformulation:"disastersoccurwhenhazardsmeetvulnerability."[2]Anaturalhazardwillhenceneverresultinanaturaldisasterinareaswithoutvulnerability,e.g.strongearthquakesinuninhabite
3、dareas.Thetermnaturalhasconsequentlybeendisputedbecausetheeventssimplyarenothazardsordisasterswithouthumaninvolvement.[3]NaturalhazardsMainarticle:NaturalhazardAnaturalhazardisathreatofaneventthatwillhaveanegativeeffectonpeopleortheenvironment.Manynaturalha
4、zardsarerelated,e.g.earthquakescanresultintsunamis,droughtcanleaddirectlytofamineanddisease.Aconcreteexampleofthedivisionbetweenhazardanddisasteristhatthe1906SanFranciscoearthquakewasadisaster,whereasearthquakesareahazard.Hazardsareconsequentlyrelatingtoafu
5、tureoccurrenceanddisasterstopastorcurrentoccurrences....NaturaldisastersMainarticles:disasterandlistofdeadliestnaturaldisastersLossofdignityIn1994JoeMurfinlosthisdignityLandmovementdisastersAvalancheswww.enteacher.cn我的教师网Avalancheonthebackside(East)ofMt.Tim
6、panogos,UtahatAspenGrovetrailNotableavalanchesinclude:·The1910Wellingtonavalanche·The1954Blonsavalanches·The1970Ancashearthquake·The1999GaltürAvalanche·The2002Kolka-KarmadonrockiceslideEarthquakesAnEarthquakeisasuddenshakingorvibrationoftheEarth'scrust.Thev
7、ibrationsmayvaryinmagnitude.Theearthquakehaspointoforiginundergroundcalledthe"focus".Thepointdirectlyabovethefocusonthesurfaceiscalledthe"epicentre".Earthquakesbythemselvesrarelykillpeopleorwildlife.Itisusuallythesecondaryeventsthattheytrigger,suchasbuildin
8、gcollapse,fires,tsunamisandvolcanoes,thatareactuallythehumandisaster.Asmanyofthesecouldbeavoidedbybetterconstruction,safetysystems,earlywarningandevacuationplanning,thetermunnaturaldisasterisnotunwarra
