准实时中小地震震源机制波形自动反演系统的构建及在首都圈地区的应用

Quasi-automatic Waveform Inversion for Focal Mechanisms of Small to Moderate Earthquakes and its Application in the Capital Area

基于Cut And Paste(CAP)全波形拟合反演震源机制解方法,依托中国地震局地震预测研究所准实时地震波形数据服务系统,通过接收区域实时连续波形数据,构建了首都圈地区准实时准自动波形反演系统,使系统实现当地震大于3.5级时,可自动、迅速反演得到震源机制解。同时考虑到一些台站的地震波形质量或信噪比等因素,系统也可通过人为干预方式重新反演求得相关结果。文中详细阐述了震源机制解波形反演系统的运行流程及该系统的基本构建思路,并对实例进行对比分析,表明该系统具有较好的实用性。

We developed a quasi-automatic mechanisms of small to moderate earthqua （CAP） method and continuously monitor real time waveform inversion system for focal kes in Capital area, by using the Cut-And-Paste regional broadband waveform data provided by the Institute of Earthquake Science, CEA, which can automatically detect the occurrences of seismic events and determine the focal mechanism solutions in real-time. In this study, automatic solutions can be obtained rapidly when the earthquake has occurred （M〉3.5）. In addition, since some bad or low signal-to-noise ratio （SNR） data can be included and participated in the inversion, the focal mechanism solutions can also be manually obtained. The system operation process and construction consideration are detailedly elaborated in the paper, and the system has preferable practicability by comparing the results with others.