基于分形盒维算法的天然地震波初至拾取方法研究  

Study of seismic arrival picking method based on the fractal box method

作　　者：张琪[1] 王有学[1] 熊彬[1] 蒋婵君[1] 王心宇[1] 曾成[1] ZHANG Qi;WANG Youxue;XIONG Bin;JIANG Chanjun;WANG Xinyu;ZEN Cheng(School of Earth Sciences,Guilin University of Technology,Guilin 541006,China)

机构地区：[1]桂林理工大学地球科学学院,桂林541006

出　　处：《物探化探计算技术》2019年第2期181-185,共5页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家自然科学基金项目(41574039);广西自然科学基金重点基金项目(2016GXNSFDA380014)

摘　　要：基于分形理论,提出了一种地震波初至的拾取方法,根据地震初至波到达前后时间序列的分形特征,采用适当的时间窗口,可以定量地确定初至波的到达时间。数值计算表明,当窗口大小为0.6 s时,计算速度合适,可以保证地震波波至时间的拾取精度,并且在广西地区的宽频带地震流动台网记录的地震数据处理中进行了应用。Based upon the fractal theory,this study presents a method to pick seismic arrivals.This method can identify the position of the first break according to the variation of fractal box dimension.The before arrival is different from that after the arrival according to the fractal box dimension.Numerical tests indicate that the method can pick the seismic arrivals automatically with a high accuracy when use a 0.6 s time window.Finally,the method is used in the arrival picking for the seismic data acquired in the portable seismic array in Guangxi province.

关 键 词：地震信号 分形盒维 地震波至拾取 

分 类 号：P631.4[天文地球—地质矿产勘探]