地震加速度监测中事件检测策略比较研究

英文篇名：STUDY ON COMPARISON AMONG EVENT DETECTION STRATEGIES FOR EARTHQUAKE ACCELERATION MONITORING
中文刊名：大地测量与地球动力学
英文刊名：Journal of Geodesy and Geodynamics
作者：李昌珑 ; 廖成旺
英文作者：Li Changlong1 ; 2) and Liao Chengwang1 ; 2) 1)Key Laboratory of Earthquake Geodesy ; Institute of Seismology ; CEA ; Wuhan 4300712)Wuhan Base of Institute of Crustal Dynamics ; CEA ; Wuhan 430071
中文关键词：地震加速度 ; 事件检测 ; P波 ; STA/LTA算法 ; 带通滤波
英文关键词：earthquake acceleration ; event detection ; P-wave ; STA/LTA algorithm ; band-pass filtering
出版日期：2012-08-15
机构：中国地震局地震研究所(地震大地测量重点实验室);中国地震局地壳应力研究所武汉科技创新基地;
年：2012
期：S1
出版单位：大地测量与地球动力学

摘要

地震加速度监测中,实时、准确的事件检测具有重要意义。事件检测的常用方法是STA/LTA算法,使用地震加速度原始数据。考虑将地震加速度原始数据进行带通滤波和加速度速度数据转换,再使用STA/LTA算法。研究表明,带通滤波和速度数据都能优化事件检测的效果;二阶同四阶带通滤波效果差别不大;同时使用二阶带通滤波和速度数据的策略检测效果最好。
In earthquake acceleration monitoring,quick and accurate event detection is significant.The STA/LTA algorithm based on original earthquake acceleration data is often used in event detection(triggering P-wave).A strategy is presented,which at first,processes the earthquake acceleration data in two ways band-pass filtering and velocity data computing then uses the STA/LTA algorithm.The study shows that band-pass filtering and velocity data computing can both enhance the effect on event detection,hopwever,the effects of second and fourth order band-pass filtering are slightly different and it is better by using second order band-pass filtering and velocity data computing.

引文

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