基于单台P波初始记录的地震震中和震级快速测定方法研究  

Quick Measuring Method Study for Earthquake Epicenter and Magnitude Based on Initial Recording of the P Wave Recorded at the Single Station

作　　者：刘希强[1] 李霞[1] 蔡寅[1] 赵瑞[1] 李红[1] 周彦文[1] 王庆民[1] 赵大鹏[1] 徐长朋[1] 

机构地区：[1]山东省地震局,山东济南250014

出　　处：《地震研究》2012年第4期514-521,597,共8页Journal of Seismological Research

基　　金：国家科技支撑计划课题(2012BAK19B04);中国地震局地震科技星火计划攻关项目(XH12029)联合资助

摘　　要：利用山东数字化测震单台三分向记录,选择2种测定地震方位角方法和7种数据预处理方法,通过对实际结果的系统对比分析,确定了最佳的测定地震方位角的技术方案和适于地震预警的测震台站。对测定震中距和震级的方法进行了改进,得到了最佳的根据直达P波前2s波形的包络特征参数求震中距、峰值速度的统计关系,以及根据包络特征参数求震级的标度关系。快速测定震中距和震级方法在实时地震预警中具有应用前景。Based on initial motions of the three-component P wave data recorded at a single station in Shandong Seis- mic Network, compared with actual results, we established the optimum technical scheme of measuring earth- quake azimuth and the stations applying to earthquake early warning from two kinds of measuring earthquake azi- muth methods and seven kinds of data preprocessing methods. We improved the method of determining earth- quake magnitude and epicenter distance, and got the best statistical relation between epicenter distance and peak velocity using envelop characteristic parameters of 2s waveforms before the P arrivals. We also got magnitude scaling relation based on the envelope characteristic parameter. The quick measuring method for earthquake epi- center and magnitude exhibits practical application prospect in real-time earthquake early warnina.

关 键 词：山东测震台网 单台定位 方位角测定 地震预警 

分 类 号：P319.6[天文地球—固体地球物理学]