2023/12/18 积石山Mw6.0地震初步破裂模型

Preliminary rupture models of the 18th Dec. 2023 Jishishan Mw6.0 earthquake in China

概述

本次地震发生于2023年12月18日23:59(UTC+8)，使用GCMT(Global Centroid Moment Tensor)提供的矩张量解(Ekström et al,2012)， 采用走向为164°的节面反演得到模型1，矩震级Mw=6.0，破裂持续时间约为9秒； 采用走向为303°的节面反演得到模型2，矩震级Mw=6.0，破裂持续时间约为7秒

反演所需强震数据来自中国地震台网中心，采用台网中心给定的发震时刻和震源位置，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1下载：20231218155930_Jishishan_Rupture_Info_1.txt

模型2下载：20231218155930_Jishishan_Rupture_Info_2.txt

提供者：北京大学地球物理学系张勇研究组 徐晨雨

引用：华思博，徐晨雨，周江诚，徐贝贝，冯万鹏，张勇，房立华.(2024). 2023年MW6.0积石山地震震源特征与灾害机理. 地球物理学报. DOI：10.6038/cjg2024S0089

模型1

波形拟合

模型2

波形拟合

参考文献

1. Ekström, G., Nettles, M., and Dziewonski, A.(2012). The global CMT project 2004-2010: Centroid-moment tensors for 13,017 earthquakes, Phys. Earth Planet. Inter., 200-201, 1-9.

2. 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.

3. 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.

4. 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.

5. 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.