2023/12/02 菲律宾Mw7.7地震破裂模型
Preliminary rupture model of the 2nd Dec. 2023 Philippines Mw7.7 earthquake
概述
本次地震发生于2023年12月2日14:37(UTC),矩震级Mw=7.7,破裂持续时间约为61秒.
远震反演所需数据来自于IRIS,格林函数采用QSSP程序(Wang et al., 2017)计算,所用一维速度结构为AK135模型(Kennett et al., 1995). 采用USGS定位结果和CENC初步震源机制结果,使用Ruptel 3.0软件进行反演(Zhang et al., 2012),确定了此次初步破裂模型, 根据该模型,此次地震机制以逆冲为主,破裂存在从深部向浅部延伸的迹象,浅部滑动将导致较为明显的海底垂直形变,有引发海啸的可能.
模型下载:20231202143703_Philippines_Rupture_Info.txt
提供者:北京大学地球物理学系 张勇
地表形变
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. Kennett B., Engdahl E., and Buland R. (1995). Constraints on seismic velocities in the earth from travel times, Geophys. J. Int. 122, 108–124.
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., Feng W., Chen Y., Xu L., Li Z., Forrest D. (2012). The 2009 L’Aquila MW 6.3 earthquake: a new technique to locate the hypocentre in the joint inversion of earthquake rupture process, Geophys. J. Int., 191, 1417-1426.