18561.2010年新西蘭南島darfield地震同震形變觀測及斷層破裂研究

1、版權聲明任何收存和保管本論文各種版本的單位和個人，未經(jīng)本論文作者同意，不得將本論文轉借他人，亦不得隨意復制、抄錄、拍照或以任何方式傳播。否則，引起有礙作者著作權之問題，將可能承擔法律責任。北京大學2013級碩士研究牛論文SurfaceDeformationof2010Darfield，NewZealand，EarthquakebySARandAnalysisofCoseismicFaultRuptureLuoXuwei(Geophysi

2、cs)Advisor：ShenZhengkangAbstractThe2010Mw71Darfield，NewZealandearthquakeoccurred011previouslyunknownfaults，whichabsorbaminorportionofrelativeplatemotionbetweenthePacificandAustraliaplatesWeattempttoobtaindetailedmappinga

3、boutfaultgeometryandrupturedistributionofthiseventusingInSARandsurfaceoffsetsdata，theresultisusefulinunderstandingtectonicprocessesandseismichazardsoftheregionCombininggeologicalfieldsurveyobservationswithSARdisplacement

4、fringes，correlation，andrangeandazimuthoffsets，weidentifyfourfaultsslippedduringcoseismicrupture，ofwhichninesegmentsaredistinguishedwithvariousstrikesanddipanglesOurinversionresultshowsthatslipisconcentratedintheupper10km

5、depthSlipsalongtheGreendalefault(composedoffoursegments)arepredominantlydextral，withamaximumofupto80mThefaultlocatednorthoftheGreenfieldfaultandcoincidingwiththeearthquakehypocenterslippedreverselyupto52mThethirdfaultloc

6、atedwestoftheGreendalefaultalseverselyruptured，withapeakof45mSliponthefourthfault(10catednorthoftheGreendalefaultandeastofthesecondfault)isminor，nomorethan21mWealsocomparethetop1kmslipalongtheGreendalefaultwithsurfacerup

7、turedistribution，andfindverygoodagreementbetweenthetwoThemaximumsurfaceslipisabout6m，locatedabout26kmeastofthewestendofthefaultsurfaceruptureThetotalseismicmomentreleaseis501019Nm，equivalenttoanMw271eventMainfeaturesofIn

8、SARdataarewellrecoveredinourmodelpredictiontheresidualsneartheepicenterarelessthan20cm，confnminggooddatafittingofourfaultslipmodelBasedonourfaultslipmodelwecalculateabout1barofCoulombstresschangeatthehypocenterofthesubse