STA/LTA算法拾取微地震事件P波到时对比研究

英文篇名：Comparison of STA/LTA P-pickers for micro seismic monitoring
中文刊名：地球物理学进展
英文刊名：Progress in Geophysics
作者：吴治涛 ; 李仕雄
英文作者：WU Zhi-tao~1 ; LI Shi-xiong~(1 ; 2) ( 1.Environment and Resource Department ; Southwest University of Science and Technology ; Mianyang 621010 ; China ; 2.The Western Mining Post-doctoral Work Station ; Xining 810100 ; China)
中文关键词：STA/LTA算法 ; 微地震监测 ; P波到时
英文关键词：STA/LTA algorithm ; Micro seismic monitoring ; P-arrival time
出版日期：2010-10-15
机构：西南科技大学环境与资源学院;西部矿业博士后工作站;
年：2010
期：05
出版单位：地球物理学进展

摘要

本文将HZ-MS48微地震采集仪监测的实际数据,利用STA/LTA算法来识别微地震事件P波到时.比较了在不同STA(短时窗平均值)情况下对拾取精度和结果的影响.结果表明:此算法确定信噪比比较高的微地震事件是非常有效的,能精确拾取P波到时.利用5ms、10ms、20ms三种不同的短时窗处理数据,发现对P波拾取的敏感程度不同,短时窗的值越大,拾取P波的敏感性越低,拾取精度降低,触发的阈值应随着短时窗的增加而减小.
This paper introduces the STA/LTA algorithm to deal with the data obtained by the HZ-MS48 micro seismic monitoring acquisition instrument.To identify micro seismic events P-wave arrives,we compared the results of picking precision on the different STA (short-time window on average) cases.The results show that the STA/ LTA algorithm determines the high signal-to-noise ratio (SNR) micro seismic events very effectively.The sensitive degree of picking P wave is different in the cases of using different short-time windows.The greater value of short-time windows,the lower sensitivity and accuracy.The triggering threshold should decrease with the increase of short-time window.

引文

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