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Shen Chongyang,Wu Yun,Gan Jiasi
Author NameAffiliation
Shen Chongyang Institute of Seismology, CSB, Wuhan 430071, China 
Wu Yun Institute of Seismology, CSB, Wuhan 430071, China 
Gan Jiasi Institute of Seismology, CSB, Wuhan 430071, China 
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基金项目:国家重点基础研究发展计划(973计划)(G1998040703)
A Physical Method of Analyzing the Mechanism of Continental Strong Shocks from Crustal Movement
Shen Chongyang,Wu Yun,Gan Jiasi
Abstract:
In order to analyze the mechanism of continental strong shocks from the angle of crustal movement using the data of repeated geodetic survey, this paper has proposed a physical method; it analyzes the mechanism of density change due to the occurrence of strong shocks by use of the physical quantity that reflects the time change of crustal density. ( 1 ) The general theory of the time change of density in the earth' s interior and the theory of the time change of single layer density have been introduced, and an algorithm of stepwise iteration has been proposed; (2) The effect of the change of single layer density caused by fault dislocation has been analyzed in brief; (3) The characteristics of the time change of crustal density in the south of the seismogenic region before the 1996 Lijiang earthquake with ML = 7.0 have been studied; (4) The precursor model or causal mechanism of strong shocks possibly existing in the time change of crustal density has been investigated preliminarily.
Key words:  Crustal movement  Mechanism of strong shocks  Density change  Physical method