| Study on determination of stress level by seismic stress drops and the stress axis deflections before and after large earthquakes |
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| 作者姓名： | 万永革 |
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| 作者单位： | [1]Institute of Geophysics, China Earthquake Administration, Beijing 100081, China [2]Institute of Disaster Prevention Science and Technology, Hebei 005201, China |
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| 基金项目： | Foundation item： National Natural Science Foundation of China （40374012） and State Key Fundamental Research Development Plan Project （2001CB711005）. Contribution No. 06FE3024, Institute of Geophysics, China Earthquake Administration.The author is grateful to Prof. SHI Yao-lin, Prof. XU Zhong-huai and Prof. ZHA0 Yong＇an for their encouragement, support and assistance in the study. |
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| 摘 要： | Introduction The study of tectonic stress field, a major branch of the Earth science, plays an important role in geodynamics. The world stress map plan started from 1980s and was leaded by Zoback. Lots of scientists from many countries participated this plan. The plan collected global tectonic stress measurements and research results and established global stress database. The world stress map was edited based on the global stress database. The world stress map reflected feature of global li…
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| 关 键 词： | 地震 地应力 偏差 震波 |
| 文章编号： | 1000-9116（2006）05-0507-07 |
| 收稿时间： | 2006-03-09 |
| 修稿时间： | 2006-06-09 |
Study on determination of stress level by seismic stress drops and the stress axis deflections before and after large earthquakes |
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| WAN Yong-ge.Study on determination of stress level by seismic stress drops and the stress axis deflections before and after large earthquakes[J].Acta Seismologica Sinica(English Edition),2006,19(5):507-513. |
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| Authors: | WAN Yong-ge |
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| Institution: | Institute of Geophysics,China Earthquake Administration,Beijing,100081, China;Institute of Disaster Prevention Science and Technology, Hebei,065201, China |
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| Abstract: | To obtain the stress level at the earthquake source, this paper sets forth the solution of the stress magnitude at the earthquake source by seismic stress drop and the stress axis deflections before and after large earthquakes. The pre-seismic and post-seismic stress direction can be statistically determined by a large collection of foreshock and aftershock focal mechanism data while the stress drop can be determined through the source fracture inversion from seismic wave data or crust deformation data. The paper attempts to make a fundamental contribution to seismic dynamics. |
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| Keywords: | stress level seismic stress drop stress axis deflection |
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