简介：AmagneticanomalywasrecordedatEasterIslandon27February2010duringtheChiletsunamievent.Thephysicsofthemagneticanomalyisanalyzedusingkinematicdynamotheory.Usingasinglewavemodel,thespaceandtimebehaviorofthemagneticfieldisgiven.Byjointanalysisofthemagneticobservations,tidegaugedataandnumericalresultsoftheglobaltsunamipropagation,weshowthecloseresemblancebetweenthepredictedspatialandtemporalmagneticdistributionsandthefielddata,indicatingthemagneticanomalyatEasterIslandwasactuallyinducedbythemotionofseawaterundertsunamiwaves.SimilaritybetweenthefieldmagneticdataatEasterIslandduring2010Chiletsunamiandseasurfacelevelisverifiedwithrealistictsunamipropagatingmodel.