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

动态演示

波形拟合

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.