P波初至到时自动拾取技术研究
Research on Automatic Picking up Technique of P-wave First Arrival Time
王俊 1杨驰 1詹小艳 1朱峰 1张金川 1钱婷1
作者信息
摘要
基于粘滞性单自由度振动器响应下的能量转换理论,提出利用阻尼能量作为目标函数的P波震相到时拾取方法——SDOF Picker算法.使用该方法对江苏及邻区2010-2016年实际记录的9 607组P波初至进行到时自动拾取测试,以地震编目中人工拾取到时为基准,与利用AIC算法自动拾取的结果进行了系统性对比分析,结果显示:SDOF Picker算法和AIC算法自动拾取P波初至的准确率分别为97.1％、91.8％,中值偏差分别为(0.02±0.61)s、(0.05±0.77)s,方差分别为0.37 s2、0.60 s2,这表明SDOF Picker算法的在准确率和拾取精度方面均优于AIC算法.
Abstract
In this paper,we presented a new approach-SDOF picker algorithm for picking up P-phase arrival time without requiring detection interval or threshold settings,which is based on the single degree of freedom (SDOF) response energy conversion theory.The algorithm SDOF Picker transforms the signal into a response domain of a single-degree-of-freedom (SDOF) oscillator with viscous damping and then tracks the rate of change of dissipated damping energy to pick P-wave phases.Automatic picking up 9 607 P wave phase records in Jiangsu and adjacent areas during the period of 2010-2016,comparative analysis was made by using AIC algorithm on the basis of the results of manual catalog,the results showed that,the automatic picking accuracy of first P wave arrival time by SDOF Picker algorithm and AIC Picker algorithm were 97.1％ and 91.8％,the median deviation were (0.02 ± 0.61) s,(0.05 ± 0.77) s,the variance were 0.37 s2,0.60 S2,the accuracy and pickup precision,were significantly higher using SDOF Picker than AIC Picker.
关键词
粘滞性单自由度振动器/阻尼能量/P波初至到时/AIC算法/SDOF/picker算法Key words
Single-Degree-Of-Freedom (SDOF) Oscillator with viscous damping/damping energy/P wave first arrival time/AIC picker algorithm/SDOF Picker algorithm引用本文复制引用
基金项目
中国地震局星火技术项目(XH15018Y)
江苏省科技支撑——社会发展项目(BE2016804)
中国地震局“三结合”课题(CE-JC/3JH-171109)
出版年
2018
NETL
NSTL
维普
万方数据