简介：ThispaperpresentsthecontemporarymotionandactivedeformationofSouthAmericaplateandrelativemotionofNazca-SouthAmericaplateusingspacegeodeticdata.TheSouthAmericaplateismovingataverage14.5mm/awithanazimuthof15.2°andshrinkinginthewest-eastat10.9mm/a.ThegeodeticdeformationsofsiteswithrespecttotheSouthAmericaplateareinquitegoodagreementwiththeestimateddeformationsfromNNR-NUVEL1A,butthedeformationofthewesternSouthAmericaregionsisverylarge.
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