| 唐山7.8级地震孕育背景及长期前兆异常特征的三维数值模拟 |
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| 引用本文： | 冯德益,舒立德.唐山7.8级地震孕育背景及长期前兆异常特征的三维数值模拟[J].地球物理学进展,1996,11(2):105-113. |
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| 作者姓名： | 冯德益 舒立德 |
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| 作者单位： | 天律市地震局，湖南省计算技术研究所，国家地震局分析预报中心 |
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| 基金项目： | 国家地震局八五攻关课题 |
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| 摘 要： | 本文对由十余条深部地震测深部面观测结果综合归纳出来的一个华北地区岩石圈上部１２层三维非均匀模型，进行了应力场计算，并根据计算结果对唐山地震孕育背景及长期前兆异常特征进行了分析讨论。
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| 关 键 词： | 孕震背景 数值模拟 唐山地震 地震 地震前兆 |
THREE DIMENSIONAL NUMERICAL SIMULATION OF SEISMOGENIC BACKGROUND AND ANOMALOUS CHARACTERICTICS OF LONG-TERM PRECURSORS OF TANGSHAN M=7.8 EARTHQUAKE |
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| Feng Deyi, Liu Xilan.THREE DIMENSIONAL NUMERICAL SIMULATION OF SEISMOGENIC BACKGROUND AND ANOMALOUS CHARACTERICTICS OF LONG-TERM PRECURSORS OF TANGSHAN M=7.8 EARTHQUAKE[J].Progress in Geophysics,1996,11(2):105-113. |
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| Authors: | Feng Deyi Liu Xilan |
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| Abstract: | Based on the observational data of deep seismic sounding on more than 10 profiles, a 12 -layered 3-dimensional heterogeneous model of upper lithosphere of North China was established. The corresponding stress field has been calculated by using the three-dimensional finite-element method. On the basis of the numerical simulation, the seismogenic back ground and anomalous characteristics of long-term precursors of Tangshan M=7. 8 earthquake were analyzed and discussed.The results obtained show that: (1) The focus of great Tangshan earthquake was located in a hard block of North China Crust; (2) The upwarp force effecting to Crust basement from Upple Mantle may play an important role; (3) The seismogenic background and anomalous charactaristics of long-term precursors of Tangshan M=7. 8 earthquake are basically consistent with the strong body earthquake-generating modal. |
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| Keywords: | Seismogenic background Three-dimensional numerical simulation Tangshan great earthquake Strong body earthquake-generating model |
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