RESEARCH ON THE HISTORICAL DATA OF THE 1585 AD CHAOXIAN EARTHQUAKE AND ITS SEISMOGENIC STRUCTURE

In 1585,an earthquake with MS53/4 happened in the south of Chaoxian of Anhui Province,and the parameters of this earthquake listed in earthquake catalogues of varied versions are different.According to the detail textual research of the historical earthquake records,the epicenter location of this earthquake is further confirmed by means of field seismo-geological investigation in the Chaohu-Tongling region of the western Changjiang valley.Shallow seismic prospecting and drilling methods are applied to study the buried fault,the possibility of existence of seismogenic fault and fault activity in the western Changjiang valley area are analyzed in depth,and the causative tectonic background of the 1585 MS53/4 south Chaoxian earthquake is studied.The result of this study indicates that the Yanjiaqiao-Fengshahu Fault,which was active in early Pleistocene to mid-Pleistocene,is possibly the causative structure of this earthquake.To identify the seismogenic structure of the 1585 south Chaoxian earthquake is helpful to deeply know the tectonic background of the moderate and small earthquake activities in eastern China.