| 九寨沟MS 7.0地震强震动特征及构造影响 |
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| 引用本文： | 郭秋娜,周月玲,李姜,温超,齐玉妍. 九寨沟MS 7.0地震强震动特征及构造影响[J]. 地震地磁观测与研究, 2018, 39(4): 25-32. DOI: 10.3969/j.issn.1003-3246.2018.04.004 |
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| 作者姓名： | 郭秋娜 周月玲 李姜 温超 齐玉妍 |
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| 作者单位： | 中国石家庄 050021 河北省地震局 |
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| 基金项目： | 河北省地震科技星火计划（项目编号：DZ20170503012，DZ20170510060） |
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| 摘 要： | 从余震序列分布、震源机制、断裂构造、地震烈度和发震构造，简要论述九寨沟MS7.0地震及构造背景，在此基础上，整理此次地震198条强震动记录，分析强震动峰值加速度分布特征（衰减规律）及构造影响因素，发现峰值加速度在发震断层两侧的衰减具有明显的不对称性，其中NE向衰减缓慢，SW向衰减迅速，该现象不仅与发震断层的倾向、倾角有关，还与不同构造块体的介质差异密切相关。
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| 关 键 词： | 强震动 九寨沟地震 烈度 发震构造 |
Strong motion distribution of Jiuzhaigou MS 7.0 earthquake characteristics and structural analysis |
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| Guo Qiuna,Zhou Yueling,Li Jiang,Wen Chao,Qi Yuyan. Strong motion distribution of Jiuzhaigou MS 7.0 earthquake characteristics and structural analysis[J]. Seismological and Geomagnetic Observation and Research, 2018, 39(4): 25-32. DOI: 10.3969/j.issn.1003-3246.2018.04.004 |
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| Authors: | Guo Qiuna Zhou Yueling Li Jiang Wen Chao Qi Yuyan |
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| Affiliation: | Hebei Earthquake Agency, Shijiazhuang 050021, China |
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| Abstract: | This paper described the regional tectonic background and the general situation of Jiuzhaigou MS 7.0 earthquake, includes the focal mechanism, aftershock sequence, seismic structure, seismic intensity and seismogenic structure. On the basis of this work, 198 strong motion records of Jiuzhaigou earthquake are sorted out, and the distribution characteristics (attenuation law) and structural influence factors of the peak acceleration of strong motion are analyzed. The attenuation of the peak strong motion of the earthquake on both sides of the seismogenic fault is very obvious, NE side attenuation is slow, and SW side attenuates rapidly. This phenomenon is not only related to the tendency and dip angle of seismogenic fault, but also closely related to the medium difference of different tectonic blocks. |
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| Keywords: | strong motion Jiuzhaigou earthquake intensity seismogenic fault |
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