2021/05/21 漾濞地震破裂模型

Rupture model of the 21st May 2022 Yangbi earthquake in China

概述

本次地震发生于2021年5月21日13:48(UTC),矩震级Mw=6.1,震源时间函数持续时间8.5秒,最大滑动量0.62米,矩心距震源5.1千米,平均破裂速度1.1千米/秒.

反演所需强震数据由中国地震台网中心提供,破裂模型的反演基于迭代反褶积叠加(IDS)方法(Zhang et al., 2014; Zheng et al., 2020),断层面信息根据USGS(United States Geological Survey)的矩张量结果确定,格林函数采用QSSP程序(Wang et al., 2017)计算,所用一维速度结构提取自CRUST1.0模型(Laske et al., 2012).

模型下载:20210521134834_Yangbi_Rupture_Info.txt

提供者:北京大学地球物理学系张勇研究组 徐晨雨

引用: Chenyu Xu, Yong Zhang, Rongjiang Wang, Sibo Hua, Yueyi Xu, Danqing Dai, Yao Pang, Jinrong Su (2023). Application of MEMS Data to Fast Inversion of Rupture Process: Tests with Recordings from the IRREEW Network. Seismological Research Letters, 94(4): 1821-1835. doi: https://doi.org/10.1785/0220220369

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动态演示

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波形拟合

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参考文献

1. Laske, G., Masters, G, Ma, Z., and Pasyanos, M. (2012). CRUST1.0: An updated global model of Earth’s crust, Geophys. Res. Abs., 14, 3743.

2. Wang, R., Heimann, S., Zhang, Y., Wang, H., and Dahm, T. (2017) Complete synthetic seismograms based on a spherical self-gravitating Earth model with an atmosphere-ocean-mantle-core structure, Geophys. J. Int., 210, 1739-1764.

3. Zhang, Y., Wang, R., Zschau, J., Chen, Y., Parolai, and Dahm, T. (2014). Automatic imaging of earthquake rupture processes by iterative deconvolution and stacking of high-rate GPS and strong motion seismograms, J. Geophys. Res. Solid Earth, 119, 5633-5650.

4. Zheng, X., Zhang, Y., Wang, R., Zhao, L., Li, W., and Huang, Q. (2020). Automatic inversions of strong‐motion records for finite‐fault models of significant earthquakes in and around Japan. J. Geophys. Res. Solid Earth, 125, e2020JB019992.