简介：The13November2016KaikouraearthquakeoccurredinthenortheasterncoastalregionoftheSouthIsland,NewZealand.TheMw7.8mainshockgeneratedacomplexpatternofsurfaceruptures,andwasfollowedwithinabout12hoursbythreemoderateshocksofMw≥6.0.HereweuseteleseismicwaveformstoinvertforthesourceruptureoftheKaikouraearthquake.Theresultingslip-distributionmodelexhibitsinsignificantslipnearthehypocenterandthreepocketsofmajorslipzoneswithdistinctsensesofmotion.Themainshockstartedfromarupturenearthehypocenter,grewintothrustonshallowcrustalfaults~50kmnortheastofthehypocenter,andthendevelopedintotwoslipzones:adeeperonewithobliquethrustandashalloweronewithalmostpurelyright-lateralstrike-slip.Locationsofthethrustandstrike-slipmotionsintheslip-distributionmodelagreewellwithreportedcoastalupliftsandhorizontaloffsets.Theoverallslippatternisdominatedbyhorizontalmotion,especiallyatshallowdepth,duetothepartitioningofthrustandstrike-slipmotionsabovethesubductionzonemegathrust.Aftershockdistributionsuggeststhatmostaftershockstendtooccurneartheedgesofthemajorslipzonesofthemainshock.Thisobservationonaftershocklocationsmayprovideusefulinformationforseismichazardassessmentsafterlargeearthquakes.