地震英文课件.pptx
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1、EarthquakeEnglishPPTcoursewareIntroductiontoEarthquakesTheformationofearthquakesTheimpactofearthquakesEarthquakepredictionandpreventionEmergencyrescueforearthquakesFutureprospectsofearthquakescontents目录CHAPTER01IntroductiontoEarthquakesDefinitionAnearthquakeisahidden,rapidshadingofthegroundcausedbyt
2、hehiddenbreakingandrearrangingofrockalongafaultplaneOriginEarthquakestypicallyoriginateatdepthsof6to30miles(10to50kilometers)belowtheEarthssurface,alongwithfaultsthathaveaccumulatedstressovertimeDefinitionofEarthquakeMagnitudeEarthquakesareclassifiedbytheirmagic,whichisameasureoftheenergyreleaseddur
3、ingtheearthquakeThemostwidelyusedscaleistheRichterscale,whichrangesfrom1to10IntensityEarthquakescanalsobeclassifiedbytheirintensity,whichreferstothedegreeofdamageandgroundshakingcausedbytheearthquakeThemostwidelyusedintensityscaleistheMercalliscale,whichrangesfromI(notfelt)toXII(extreme)Classificati
4、onofEarthquakesEarthquakesoccurthroughouttheworld,buttheyaremorevaluableincancerduetotheirproximitytofaultlinesandplateboundariesThesocalledRingofFirearoundthePacificOceanisagranularactiveearthquakezoneGlobaldistributionEarthquakesarenotevenlydistributedwithinfaultzonesorplateboundariesTheytendtoocc
5、urinclustersorlinesalongfaultplanes,ofteninareaswherethereisahighconcentrationofrockfaultsorweakzonesintheEarthscrustLocaldistributionThedistributionofearthquakesCHAPTER02TheformationofearthquakesNaturalcausesEarthquakescanbecausedbynaturaleventssuchasvolatileoverlaps,landslides,andmeterimpactsThese
6、eventsreleaseenergythatpropagatethroughtheEarthsrust,causingseismicwavesthatresultinearthquakesHumaninducedearthquakesSomeearthquakesaretriggeredbyhumanactivitiessuchasmining,damconstruction,andnucleartestingTheseactivitiescandegraderockformations,leadingtoearthquakesThereasonsofearthquakesVSEarthqu
7、akesaremostcommonattheboundariesoftechnicalplates,wheretheymeetandinteractTheseboundariescanbeconverted,directed,ortransformed,andeachtypeisassociatedwithdifferenttypesofearthquakesSubmissionzonesEarthquakesoftenoccuratsubsectionzones,whereoneplateslideneedsanotherTheseearthquakescanbelargeandhaveth
8、epotentialtogeneratetsunamisPlateboundariesPlatetechniquesandearthquakesFaultsystemsEarthquakesoccupyalongfaults,whichareplanesorzonesofweaknessintheEarthsrustalongwhichrocksmoverelativetoeachotherFaultscanbeeithernaturalorhumaninducedStrikeslipfaultsThesefaultsproduceearthquakeswhenrocksoneithersid
9、eofthefaultfurtherslipalongthefaultplane,releasingenergythatpropagateasseismicwavesFaultsandearthquakesSeismiccyclesEarthquakesdonotoccurrandomlybutratherfollowapatternofrecurrenceknownastheseismiccycleThiscycleinvolvesperiodsofearthquakeactivityinterspersedwithperiodsofrelatedcalls要点一要点二Earthquakec
10、lustersEarthquakestendtooccurinclusters,withseverallargeearthquakesfollowingbyalargenumberofsmallonesThispatterncanpersistfordaysorevenlongerTheperiodofearthquakesCHAPTER03TheimpactofearthquakesLossoflifeEarthquakesoftenresultinthelossofhumanlife,bothdirectlyduetotheearthsphysicalforcesorindirectlyt
11、hroughsubsequenceeventssuchasbuildingcollapse,fires,ortsunamisInquiryEarthquakescancausesignificantinjuries,particularlyfromfallingdebrisorcollapsingstructuresPsychologicalimpactEarthquakescancausesignificantpsychologicaltrauma,leadingtoposttraumaticstressdisorder(PTSD)andothermentalhealthissuesThei
12、mpactofearthquakesonhumans TheimpactofearthquakesontheenvironmentNaturalhabitatdamageEarthquakescandamageordestroynaturalhabitats,leadingtothedisplayoffloraandfaunaPollutionEarthquakescancausespillsofhazardousmaterials,leadingtosoilandwaterpollutionLandsubstitutionEarthquakescancauselandtosubstituti
13、on,alteringthelandscapeandpotentiallyaffectinglocalcommunities010203PropertydamageEarthquakesoftenresultinsignificantpropertydamage,specificallytobuildingsandinfrastructureLossofincomeEarthquakescancausebusinessestoclose,leadingtolossofincomeandjobsforindividualsandcommunitiesCostofrecoveryEarthquak
14、esrequiresignificantresourcesforrecovery,includingreconstructionofdamagedbuildingsandinfrastructure,andprovidingaidandsupporttoaffectedindividualsandcommunitiesTheimpactofearthquakesontheeconomyCHAPTER04EarthquakepredictionandpreventionGeologicalsurveyExaminingthestructureandcompositionoftheEarthscr
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