AN ANALYSIS OF FAULT ACTIVITY IN SHEAR ZONE AT LOW LATITUDES FROM GPS MEASUREMENTS
利用GPS数据研究低纬度环球剪切带的活动性

Global Positioning System(GPS) measure campaign in shear zone at low-latitudes was conducted in 1991 and 2003,for quantifying the present-day major faults’ activity.The results are as follow,the north Antolia fault,Jiali fault,Sagaing fault and Sumatra fault are right lateral motion,the rates are(13.7±0.6),(5.8±0.5)(7.1±1.0),(12.7±0.2)and(25.4±0.5)mm/a respectively;while the Sorong fault and Guatemala fault are left lateral motion,the rates are 29.2±1.8),(14.1±1.0)mm/a,respectively.Besides,Sumatra fault and Jiali fault also show strong squeezing,(18.5±1.0),(15.2±0.6) mm / a,respectively,while Sorong fault show powerful pull,reached to :(10.7±1.1) mm / a.Overall,the shear activity dominats in the shear zone at low-latitudes.