周红
中国地震局地球物理研究所, 北京 100081

基金项目: 国家自然基金面上项目（41774064）资助


详细信息

作者简介: 周红, 女, 研究员, 主要从事强地面运动模拟、地震波传播激发理论的研究. E-mail:zhouhong@cea-igp.ac.cn

中图分类号: P315

收稿日期:2018-01-09
修回日期:2018-06-12
上线日期:2018-12-05

Research on ground motion displacement and static displacement near the fault of Jiuzhaigou M_S7.0 earthquake

ZHOU Hong
Institute of Geophysics, China Earthquake Administration, Beijing 100081, China



MSC: P315

--> Received Date: 09 January 2018
Revised Date: 12 June 2018
Available Online: 05 December 2018


摘要
摘要:北京时间2017年8月8日21时19分在四川省阿坝州九寨沟县（北纬33.2°、东经103.8°）发生7.0级地震，给九寨沟景区造成了滑坡坍塌等地质灾害.本文利用Crust1.0资料和反演的震源破裂过程建立了研究区三维介质模型及三维震源模型，采用谱元数值模拟方法模拟了九寨沟近断层地表地震动速度时程，并与强震台站实际速度记录的低频做了对比，两种结果对比的一致性，验证了介质模型及震源模型的有效性.在此基础上近一步模拟了地表位移时间序列，获得了位移峰值PGD及静态位移的空间分布，分析并给出了九寨沟地震地表位移的主要运动特征.
关键词: 位移峰值PGD/
静态位移/
九寨沟7.0级地震

Abstract:A M_S7.0 earthquake occurred at Jiuzhaigou County of Aba Prefecture in Sichuan Province at 21:19 on August 8 in 2017 with the epicenter at (33.2°, 103.8°) which caused the landslide, collapse and other geological disasters in Jiuzhaigou scenic area. In this paper, spectral element method was applied to calculate the ground velocity based on the three-dimensional medium model and the three-dimensional source model which were established using the Crust1.0 data and the inverted source rupture process. The simulated ground velocities were compared with the observed low-frequency velocities recorded by strong motion stations. Their agreements verified the validity of the medium model and the source model. Then, the two models were used to simulate the ground displacements which give the spatial distributions of PGD (the peak value of ground displacements) and static displacements. Lastly, the ground motion characteristics were obtained by the analysis of these spatial distributions.
Key words:Peak Ground Displacement (PGD)/
Static displacement/
M_S7.0 Jiuzhaigou Earthquake



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