简介:TheMS7.0JiuzhaigouearthquakeoccurredonAugust8,2017.TheearthquakeoccurredinthevicinityoftheTazangfault,theMinjiangfaultandtheHuyafault,wherethefocalmechanismisofthestrikesliptype.Thestaticanddynamicanomaliesofthegravityfieldcanprovideimportantphysicalfieldinformationforstudyingthestructuralpropertiesofdeepcrust.Multi-scaledecompositiontechniquesareusedtoseparateBouguergravityatdifferentdepthsandgivesomeexplanationtogravityvariationsatdifferenttimespacescales.Theresultsindicatethatthewaveletmulti-scaleresultsoftheEGM2008modelandthemeasuredgravitydataareconsistent.Throughcomparativeanalysis,itisfoundthattheJiuzhaigouearthquakeoccurredinthestressenhancedregion.Thevariationofgravityfieldatdifferenttimescaleshasacertainscientificsignificanceforfurtherunderstandingpotentialearthquakerisktrend.