| 1970年MS 7.7云南通海大地震强地面运动模拟 |
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| 作者姓名： | 谭黎中 孟令媛 史保平 |
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| 作者单位： | 1. 中国科学院研究生院地球科学院, 北京 100049;2. 中国地震台网中心, 北京 100036 |
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| 基金项目： | 中国科学院知识创新工程(KZCX2-YW-Q08-2)资助 |
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| 摘 要： | 对1970年云南通海大地震(MS7.7)进行了强地面运动模拟.采用复合震源模型和有限断层随机振动模型,针对包括昆明在内的4个特征城市的地表运动进行模拟计算.结果表明,在0.5~10 Hz频带范围内,2个模型的结果在波形、振幅、频率含量及持续时间上均具备较好的相似性.进一步采用复合震源模型模拟了通海地震的烈度分布图,与实际观测的烈度分布一致程度较高.
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| 关 键 词： | 通海地震 强地面运动 复合震源模型 有限断层随机振动模型 |
| 收稿时间： | 2011-04-15 |
| 修稿时间： | 2011-05-05 |
Strong ground motion simulation of the 1970 MS 7.7 Tonghai earthquake,Yunnan, China |
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| Authors: | TAN Li-Zhong MENG Ling-Yuan SHI Bao-Ping |
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| Institution: | 1. Earth Science College, Graduate University, Chinese Academy of Sciences, Beijing 100049, China;2. China Earthquake Networks Center, Beijing 100045, China |
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| Abstract: | Using a composite source model, we simulate the strong ground motion from the 1970 Tonghai earthquake (MS 7.7). Due to the lack of strong ground motion recordings and for verifying the reliability of simulated results,a finite fault model, developed based on the stochastic theory with the same input source parameters including fault slip distribution pattern and size, is additionally used to generate synthetic strong motion seismograms for comparison purpose. The acceleration time histories at four selected sites or cities, simulated by the two models, show good agreements in the amplitude, waveform, frequency content, and time duration within the 0.5-10 Hz frequency domain. |
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| Keywords: | Tonghai earthquake strong ground motion composite source model stochastic finite-fault modeling |
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