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Preliminary study on variation characteristics of ocean tide dynamic stress in crust and its relationship with earthquakes

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The variation characteristics of dynamic stress in crustal blocks and its relationship with earthquakes are comprehensively studied by analyzing geophysical data and calculating the dynamic response of crustal blocks in North China to the tide level change of Bohai Sea and Yellow Sea using a 3D nonlinear dynamic finite element simulation. This study has noticed some new features of crustal dynamic stress: (a) High stress level appears at the place where the stress waves superpose and interference during the process of propagation, and the enhancement of dynamic shear stress is more significant as compared with that of compressive stress; (b) Variation of dynamic stress has influence on seismogenic environment and hence earthquake occurrence; (c) As viewed from the variation characteristics of crustal dynamic stress, the superimposing process of shear stress manifests the preparation process of earthquakes.

finite element simulationtidedynamic stressearthquake

LU Ming-yong、ZHENG Wen-heng

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China Center for Earthquake Disaster Emergency and SAR, Beijing 100049, China

Huazhong University of Science and Technology, Wuhan 430074, China

国家自然科学基金

40174024

2005

地震学报(英文版)
中国地震学会

地震学报(英文版)

影响因子:0.255
ISSN:1000-9116
年,卷(期):2005.18(3)
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