The Minxian-Zhangxian MS6.6 earthquake occurred on July 22,2013,at the junction of Minxian and Zhangxian,Dingxi,Gansu Province(E 104.2°,N 34.5°).The depth of this widespread earthquake was shallow,which caused huge casualties and property losses.In this region,numerous professional strong motion observation stations recorded valuable acceleration records that accurately reflect the ground vibration of the main shock in the corresponding region of Gansu province and play an important role in the evaluation of earthquake development trends.In the present study,these acceleration records were collected and preliminary processed,and the results of peak ground acceleration were statistically analyzed.We determined that 47strong motion stations obtained acceleration records,which included four types of strong motion seismographs such as MR2002,Etna,GSR-18,and GSMA-2400.The Minxian strong motion station was the closest to the epicenter at a distance of 18.0km and peak accelerations of 160.7gal(EW),172.5gal(NS),and 78.4gal(vertical).The farthest station from the epicenter was Songshan at a distance of 297.3km and peak accelerations of 3.3gal(EW),3.1gal(NS),and 2.0gal(vertical).By calculation,we ascertained that the EW,NS,and vertical acceleration values were 1.2~160.7gal,0.4~172.5gal,and 0.4~78.4gal, respectively.This earthquake decayed quickly,and the peak acceleration of stations 100km from the epicenter was only approximately 10gal.For this earthquake,the Minxian station showed the largest peak acceleration. Located in the Minyang township of Minxian,this station is situated in a good observation environment with stable equipment;therefore,the records obtained by this station are reliable.In addition,the peak ground acceleration of each station gradually reduced with epicentral distance.However,But the effects of anisotropic media and site conditions may have resulted in unequal peak ground acceleration values for different locations at the same epicentral distance.Although the Lintan strong motion station was 79.5km from the epicenter,its peak acceleration was only approximately 5gal.The Songshan was farthest from epicenter;however,its peak acceleration was not minimal.These special conditions may be associated with local geological formations and site environment.On the basis of the peak acceleration obtained by each station,we used the Kriging interpolation method and plotted the peak acceleration map of the Minxian-Zhangxian earthquake.The simulated values accurately reflected the ground motion intensity of the earthquake for each observation point to provide basic information for research on the characteristics of strong ground motion and seismic engineering.Moreover,this map can provide an important basis for rapid damage assessment and earthquake emergency planning.In this study,the work was preliminary pending further research after accumulation of supplemental data.