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| 昆仑山口西8．1级地震的应力触发作用及对周边断层的影响 | |
| 引用本文： | 解朝娣,朱元清,雷兴林.昆仑山口西8．1级地震的应力触发作用及对周边断层的影响[J].地震地磁观测与研究,2012,33(5):93-97. |
| 作者姓名： | 解朝娣 朱元清 雷兴林 |
| 作者单位： | 1. 中国昆明650091,云南大学地球物理系 2. 中国上海200062,上海市地震局 3. 日本筑波305-8567,日本产业技术综合研究所 |
| 摘 要： | 采用可变滑动震源模型，计算Ms8．1昆仑山口西地震产生的库仑破裂应力变化，解释余震的空间分布特征。以此为基础，分析了此次大地震在周边断层上产生的应力变化及其对地震活动性的影响。结果表明，两个模型和两种方法计算得到的应力变化均呈现相似的分布特征。应力增加区与后续地震活动的对应关系，反映昆仑山口西地震对后续地震活动的触发效应。玛尼断裂带和东昆仑断裂带受应力变化影响最明显。 |
| 关 键 词： | 库仑破裂应力变化 应力触发 断层 昆仑山口西地震 最优取向断层 |
Effects of stress triggering on aftershocks and nearby faults induced by the Kunlun Ms 8.1 earthquake |
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| Xie Chaodi , Zhu Yuanqing , Lei Xinglin.Effects of stress triggering on aftershocks and nearby faults induced by the Kunlun Ms 8.1 earthquake[J].Seismological and Geomagnetic Observation and Research,2012,33(5):93-97. | |
| Authors: | Xie Chaodi Zhu Yuanqing Lei Xinglin |
| Institution: | 1) Department of Geophysics, Yunnan University, Kunming 650091, China ;2) Earthquake Administration of Shanghai Municipality, Shanghai 200062, China ;3) Geological Survey of Japan, AIST, Tsukuba 305--8567, Japan) |
| Abstract: | Using the variable slip model, we calculate the Coulomb failure stress cnanges caused by the Kunlun Ms 8. 1 earthquake, and explain the spatial distribution of aftershocks. On the basis of calculations, we determine the stress changes on nearby faults in the surrounding area, and investigate the effect on the seismic activities. Results show that the distribution of stress changes displays similar characteristics using two methods and two models. The correspondence between the stress change and seismicity is good, which indicate that the stress triggering effects induced by the Kunlun earthquake exist. The Mani fault and the eastern Kunlun fault are calculated to be obviously affected by the stress changes. |
| Keywords: | Coulomb failure stress change stress triggering fault Kunlun earthquake optimally oriented fault |
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