摘要
针对已有两类地震自动定位方法各自的优点和限制,提出了综合利用这两类方法以形成一个统一系统的方案,希望以此提高地震自动定位能力。该方案的基本流程是利用波形相关方法在连续地震波形上检测出地震事件并初定其震源位置和发震时刻;利用初定的震源位置和发震时刻,预测各台站各震相的到时;以预测的各震相到时为参考点,利用单台波形(单道或三分向)在该参考点附近精确测定震相到时;利用修定后的震相到时测定震源位置和发震时刻;根据震中距判定地震类型(地方震、近震、远震),在预期的波形段自动测定波形最大振幅和相应周期,进而测定相应类型的震级(ML、MS或mb)。
Considering the advantages and limitations of two kinds of existing methods for automated earthquake location,the author has proposed a comprehensive solution to take advantages of these two kinds of methods so as to enhance the capability of an automated earthquake location system.The basic flow of the solution is:detecting an earthquake event on the continuous seismic waveforms and getting a preliminary source location and origin time by means of the waveform correlation method;predicting the arrivals of different phases at respective stations based on the preliminary source location and origin time,with the predicted phase arrivals as reference points,using single station waveforms(one component or 3 components) to accurately determine the phase arrivals around the reference points,and calculating the source location and origin time by using the corrected phase arrivals.
出处
《地震地磁观测与研究》
2005年第1期50-56,共7页
Seismological and Geomagnetic Observation and Research
基金
中国地震局地球物理研究所论著号:04AC2045
关键词
地震自动定位
数字地震波形
波形相关
波形特征函数
automated earthquake location,digital seismic waveform,waveform correlation,waveform characteristic function
