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A powerpoint about Tsunamis and their effects.
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Tsunami
Groupsarealmostdone Groups8and9arethetwogroupsof3
Group10 HaitiEarthquakeGroup14 LakeNyosGroup15 Mt.EyjafjallajkullGroup18 OklahomaTornado
TopicsdueThursday
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Thesegroupsneed1moreperson,pleaseapplyfortheposition
Firstmidtermaweekfromtoday
WillcoverALLmaterialuptoThursdayslecture Knowterms,diagrams,andconcepts
ReviewsummaryonThursday Bringascantron (882)
GSC350NaturalDisasters
Tsunami Japaneseforharborwave Notatidalwave(notrelatedtotides) Notrelatedtoharborbutcharacterizedfromharbors
Originatefromadisplacementofwater Whatdisplaceswater?
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Earthquake Landslide Asteroid Impact
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Mostcommonduetoreversemotionatsubductionzones Whythisfaulttype?
Whenashallowearthquakeoccurs,seafloormovesanddisplaceswater
Tsunamisizedependentonrupturesize,length,andarea
EarthquakeGenerated
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EarthquakeGenerated
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EarthquakeGenerated
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EarthquakeGenerated
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EarthquakeGenerated
Landslides(ormassdisplacement)canoccuraboveandbelowwatersurface
Wewilldiscussthismorewhencoveringlandslides(aswillGroup#16)
Submarinelandslidesoccurandhavebeenvisualized*(thesedisplacelargeamountsofwaterneartheseafloor)*Seepage109ofyourbook
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Landslide Generated
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Landslide Generated
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Landslide Generated
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Landslide Generated
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Landslide Generated
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ImpactGenerated Whilechancesarelow,itisstillapossibility Displacementofwateratveryhighvelocities
1kmhighwavespossibledependentonvarietyoffactors Depthofwater Sizeofimpact
Notamajorhazardduetofrequency
Othersourcesmuchmorelikely
Aftertsunamiinitiates,ittravels Fasterindeepwater Slowerinshallowwater
Wavelength Distancebetweencrests WavePeriod Timebetweencrests
WaveHeightAmplitude ofcrests
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Movement
Velocityisafunctionofdepth
C=gD
C=Velocityinmeterspersecondg=accelerationduetogravity(9.8m/s2)D=Depthinmeters
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Movement
C =9.8(1200) C =108.4m/s D=1200m?
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Movement
Whenatsunamistrikesland,itrushesinlandanddispersesenergy
Runup Themaximumelevationtsunamiwaterreachesonshore
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Onshore
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Whatcankillyouinatsunami?
Exercise#19 Ihighly suggesttoreaditbeforehand Understandgeologictime(figure19.2)
Howdowedefineafaultasactive? CrossCuttingRelationships
Tocutthroughsomething,thatsomethinghadtobetherefirst
Ifafaultbreaksalavaflowthatis6,000yearsold,thenthefaulthasbeenactivewithinthepast6,000years
Yourexamwillincludepracticesfromyourexercises(askquestions!)
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