| 关于中强震前的应变加速释放现象 |
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| 作者姓名： | 蒋长胜 吴忠良 |
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| 作者单位： | 1. 中国地震局地球物理研究所, 北京 100081;
2. 中国科学院研究生院计算地球动力学实验室, 北京 100049 |
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| 摘 要： | 针对中强地震前是否会出现地震活动性增强现象的问题,研究了1990～2003年中国MS70以上地震.对于同一个地震事件,考虑了多个不同的时间和空间尺度,结果表明,中强震前的地震活动性远比用简单的应变加速释放模型来描述复杂得多.因此,将应变加速释放模型应用于地震危险性估计,仍需做更多的研究.
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| 关 键 词： | 贝尼奥夫应变 矩释放加速现象 地震的临界点模型 |
| 收稿时间： | 2004-07-15 |
| 修稿时间： | 2004-10-18 |
Accelerating Strain Release before Strong Earthquakes:More Complex in the Real World |
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| Authors: | JIANG Chang-Sheng WU Zhong-Liang |
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| Institution: | 1. Institute of Geophysics, China Earthquake Administration, Beijing 100081, China;
2. Laboratory of computational Geodynamics, Graduate School of the Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | Considering different spatial and temporal ranges for the same earthquake，we investigate the objectivity and generality of the phenomenon of accelerating strain release before stmng earthquakes. A systematic analysis of all the earthquakes which occurred in China with Ms≥7.0 from 1990 to 2003 is conducted. It is found that the real seismic activity seems much more complex than the simple pattern as described by the accelerating strain release model.Therefore，the potentials of application of accelerating strain release model to the estimation of seismic hazard are in need of future investigation. |
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| Keywords: | Benioff strain accelerating strain release critical-point-like model of earthquakes |
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