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THE HETEROGENEITY OF THE EARTHQUAKE -GENERATING ENVIRONMENTS OF CONTINENTAL EARTHQUAKE IN CHINA AND THE COMPLEXITY OF THEIR SEISMIC PRECURSORS

Zhang Zhaocheng Zheng Dalin Wang Guixuan Jia Qing Qin Xinxi (Center for Analysis and Prediction, SSB)  
The paper discusses the relationship between the heterogeneity of seismic activity and terrace condition, between the heterogeneity of seismicity and tectonophysical conditions, as well as that between the heterogeneity of the dynamic development of seismicity and geodynamic conditions. Besides, the relation of the complexity of seismic precursors to difference of types of seismic sources, regionality and principal features of seismic precursors of continental earthquakes in China have also been discussed. It is suggested that the complexity of seismic precursors has its profound physical basis of generation. It can be attributed basically to the heterogeneity of the physical conditions of geologic-structural environment and seismic source medium that occurred in different scales, different level and different stages of seismic generation. The generation of tectonic earthquakes is a process that occurs in a long period in a large regional earthquake-generating system. The distinction between the tectonic precursors and seismic source precursors from the practically observed complex and generalized seismic precursors is a effective approach to the study of the physical process of earthquake generation as well as to earthquake prediction.
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