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《SEISMOLOGICAL RESEARCH OF NORTHEAST CHINA》 1996-04
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DISCUSSION ON GEOPHYSICAL BACKGROUND OF HAICHENG EARTHQUAKE GENESIS

Zhao Zhen Gu Guangyu (The Seismological Bureau of Liaoning province,Shenyang,110031)  
The authors discussed geophysical background of Haicheng earthquake genesis on the basis of spacial distribution of the aftershocks,ground fractures and deformation data obtained after the main shock in this paper.It is showed that the medium in low velocity layer of middle crust probably is of low density,high temperature and high conductivity theoretically,and other mechanical property of the medium also change,so more elactical strain energy difficultly is stored in the medium and stress is transfered to upper crust.Finally,high stress concentration is engendered in the upper crust and seismogenic volume forms;for this reason the existence of low velocity layer probably is important bases for judging the place where strong earthquake will occur
【CateGory Index】: P315
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