Professor Zheng Yong of China University of Geosciences, Professor Chu Risheng of the Institute of Surveying and Geophysics, Chinese Academy of Sciences, and Professor Yao Huajian of the University of Science and Technology of China  completed the solution of the focal mechanism of the experimental field.The team studied the mechanism of earthquakes with a magnitude of 4.0 or higher in the China Earthquake Experimental site, and gave the seismic source nature and depth of the research area, as well as fault characteristics, which can provide critical support for the establishment of a comprehensive model of the experimental field. . The three research groups independently conducted research, and the three results were in good agreement on larger earthquakes (Ml> 4.5 magnitude). The 4.0 to 4.5 magnitude earthquakes were generally consistent and the results were reliable.

Fig.1 The spatial distribution of the focal mechanisms