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首页> 外文期刊>Seismological research letters >Ground Motion from M-w 1.5 to 3.9 Aftershocks of the 2014 M-w 6.2 Jinggu Earthquake at Hypocentral Distances < 45 km in Yunnan, China
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Ground Motion from M-w 1.5 to 3.9 Aftershocks of the 2014 M-w 6.2 Jinggu Earthquake at Hypocentral Distances < 45 km in Yunnan, China

机译：来自M-W 1.5至3.9 2014 M-W 6.2的地面行动2014 M-W 6.2 Jinggu地震，在斜颈距离<45公里，中国云南

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摘要

The ground motion from small aftershocks of the 2014 M-W 6.2 Jinggu earthquake in Yunnan Province is analyzed. With the seismic records, we assess the site conditions and develop a ground-motion prediction equation (GMPE) for this region. The strong-motion duration is also calculated to further understand the potential seismic hazard to nearby structures. The dataset includes 504 events with M-W 1.5-3.9 and 2956 three-component records at hypocentral distances <45 km from 10 stations operated by the Earthquake Administration of Yunnan Province. The ground-motion amplification factor derived from the horizontal-to-vertical (H/V) spectral ratio of each station ranges from 1.1 to 5.2 (0.04-0.72 in log units). The time-averaged shear-wave velocity to 30 m depth (V-S30) for seismographic stations is estimated using fundamental frequencies associated with peak H/V ratios. GMPE is obtained using the entire dataset. The values of the geometrical spreading coefficient for the pseudoabsolute response spectral acceleration (PSA) at a frequency of 10 Hz suggest higher decay than those for the peak ground velocity, peak ground acceleration (PGA), and PSA at other frequencies. The significant duration (D-s) of strong ground motion systematically decreases with PGA but increases with hypocentral distance. However, no strong correlation is observed for D-s and magnitude or for D-s and V-S30. The results of this study are compared with analogous research (Babaie Mahani and Kao, 2018) on induced earthquakes with the same distance-magnitude range. The comparison indicates that the decay of ground-motion amplitudes with hypocentral distance in our case is generally lower than that in the other study. The D-s trends are consistent in the two studies, although the longest strong-motion duration in the two cases apparently differs.
机译：分析了2014年M-W 6.2云南省京谷地震的小余震的地面行动。通过地震记录，我们评估了该地区的场地条件并开发了地面运动预测等式（GMPE）。还计算出强运动持续时间，以进一步了解附近结构的潜在地震危害。该数据集包括504个M-W 1.5-3.9和2956个斜视距离的三组件记录，距离云南省地震施用的10站有45公里。从每个站的水平到垂直（H / V）光谱比率的地面运动放大因子范围为1.1至5.2（日志单位中0.04-0.72）。利用与峰值H / V比率相关的基本频率估计地震站的时间平均剪切波速度至30米深度（V-S30）。使用整个数据集获得GMPE。在10Hz的频率下伪粘性响应频谱加速度（PSA）的几何扩展系数的值表明，在其他频率的峰接地速度，峰接地加速度（PGA）和PSA中的衰减较高。强型运动的显着持续时间（D-S）用PGA系统地降低，但随着斜斜滞的距离增加。然而，对于D-S和幅度或D-S和V-S30没有观察到强烈的相关性。该研究的结果与类似的研究（Babaie Mahani和Kao）进行了比较，在具有相同距离范围的诱发地震上。比较表明，在我们的案例中具有斜视距离的地面运动幅度的衰减通常低于另一个研究中的距离。 D-S趋势在两项研究中是一致的，尽管两种情况下的最长的强烈运动持续时间明显不同。

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  • 来源
    《Seismological research letters》 |2019年第5期|共13页
  • 作者

    Sun Mengyao; Zhu Huiyu; Zhang Jie; Fu Haohuan; Tian Xiao;

  • 作者单位

    Tsinghua Univ Dept Earth Syst Sci Shuangqing Rd 30 Beijing 100084 Peoples R China;

    Univ Sci &

    Technol China Geophys Res Inst Sch Earth &

    Space Sci Jinzhai Rd 96 Hefei 230026 Anhui Peoples R China;

    Univ Sci &

    Technol China Geophys Res Inst Sch Earth &

    Space Sci Jinzhai Rd 96 Hefei 230026 Anhui Peoples R China;

    Tsinghua Univ Dept Earth Syst Sci Shuangqing Rd 30 Beijing 100084 Peoples R China;

    East China Univ Technol Sch Geophys &

    Measurement Control Technol Econ Dev Zone Guanglan Rd 418 Nanchang 330013 Jiangxi Peoples R China;

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  • 正文语种 eng
  • 中图分类 地震学;
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