基于DFP算法的小尺度微震定位方法研究  

Study on Small-Scale Microseismic Location Method Based on DFP Algorithm

作　　者：崔仁胜[1,2] 陈阳[1] 王洪体[1] 陈翰林[1] 李江[1] 林湛[1] 周银兴[1] 

机构地区：[1]中国地震局地震预测研究所(中国地震局地震预测重点实验室),北京100036 [2]中国地震局地球物理研究所,北京100081

出　　处：《震灾防御技术》2014年第B10期639-647,共9页Technology for Earthquake Disaster Prevention

基　　金：中国地震局地震预测研究所基本科研业务专项:基于中小地震震源参数及地震矩张量反演的强震趋势预测研究(2014IES0307);国家科技支撑计划:强震预警技术研究与示范(2012BAK19B04)

摘　　要：针对小尺度微震活动监测的需要,本文基于DFP优化算法以传感器监测到时和计算到时的残差平方和最小为目标函数来进行微震震源位置定位,并对该方法进行了计算机数值仿真。仿真结果表明,DFP算法可用来进行地震定位,其定位结果受计算初值影响较小,而受走时误差和波速误差影响较大。通过野外微震观测实验研究,证明DFP法定位精度较高,适用于小尺度微震活动定位分析。To meet the small-scale monitoring ofmicroseismic activity, a new microseismic location method （DFP method） is developed based on DFP algorithm by minimizing sums of squares due to residual between calculated and monitored arrival time. The DFP method is simulated by PC, and the results show that DFP algorithm can be used for seismic location, and the convergence precision of the DFP method is affected by the error of the arrival time and the wave speed, which is not affected by the initial values. The result of the experience shows that the DFP method with high accuracy is reliable for small-scale microseismic location.

关 键 词：微震监测系统 地震定位 DFP法 初值 走时 波速 

分 类 号：P315.6[天文地球—地震学]