2023/02/23 塔吉克斯坦Mw6.9地震初步破裂模型

Preliminary rupture model of the 23rd Feb. 2023 Tajikistan Mw6.9 earthquake

概述

本次地震发生于2023年2月23日00:37(UTC)，矩震级Mw=6.9，破裂持续时间约为22秒.

强震反演所需数据来自中国地震台网中心，采用USGS给定的发震时刻、震源位置和地震矩张量，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)，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：20230223003740_Tajikistan_Rupture_Info.txt

提供者：北京大学地球物理学系张勇研究组 徐晨雨

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 S., 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.