简介：OnAug.8,2017,anMS7.0earthquakestruckJiuzhaigou,acountyofSichuanprovince,China.Anumberofinvestigationsandstudieshavebeenconducted,someofwhichinvolvedlocalvelocitymodels.However,thesuitabilityofthesemodelshasnotbeenproperlyaddressed.Herewecollect11already-existingmodels,includingthoseusedinstudiesofthe2017MS7.0Jiuzhaigouearthquake,choose10localstationssurroundingtheearthquake,andemploythesametechnique(TRIT)torelocatethehypocenter.Andfurthermore,wechooseamoresuitablemodelfromthe11already-existedmodelsbyanalyzingtherelocationprocessandtherelocatedresultsforreasonability.Finally,ourconclusionisthatthemodelFang2018ismoresuitableandthehypocenterparameters,103.801°E,33.192°Nand15.8kmforlongitude,latitudeanddepth,respectively,and2017-08-0813:19:46.66foritsorigintime,basedonthismodelshouldberecommendedforthe2017MS7.0Jiuzhaigouearthquake.