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The Grouping of the Strike-Slip Offset Data and Its Relation With the Seismicity Along Middle Segment of the Xiaojiang Active Fault
Authors:Shen Jun  Wang Yipeng  Song Fangmin  Yu Weixian  Cao Zhongquan  Shen Xuhui  Hou Xueying  and Li ZhixiangInstitute of Geology  SSB  Beijing  ChinaInstitute of Earthquake Engineering  Seismological Bureau of Yunnan Province  Kunming  China
Institution:Shen Jun,Wang Yipeng,Song Fangmin,Yu Weixian,Cao Zhongquan,Shen Xuhui,Hou Xueying,and Li ZhixiangInstitute of Geology,SSB,Beijing 100029,ChinaInstitute of Earthquake Engineering,Seismological Bureau of Yunnan Province,Kunming 650204,China
Abstract:The data of the strike-slip offset along the Xiaojiang active fault can be obviously grouped.The groups of small orders of magnitude data within 100 m show clear linear characteristics of increments between 8 m and 12 m,which indicates that the segments of the Xiaojiang active fault is of characteristic seismicity and the distribution of the values of each group indicates that there are smaller earthquakes and creep between two large earthquakes along each segment of the Xiaojiang active fault.The interval between two characteristic large earthquakes can be calculated with the increments for two groups of slip data and the slip rate of the fault.Furthermore,the frequency of smaller earthquakes can also be estimated by comparing the distributions of the displacements of the large earthquakes with the distributions of the values of each group of data.The groups of large slip displacements show that there is close relationship between the records of the displacements of the fault and the changes of the climate.So the slip rates of each period can be determined with the characteristics of the groups of the slip data and the events of the change of the climate.
Keywords:Xiaojiang active fault zone  Grouping characteristics of offsets  Seismicity  Linear increment  
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