摘要
频率 -波数 (F- K)谱分析是地震台阵数据处理基本方法之一。采用该分析方法 ,可以从地脉动背景中提取有用的地震信号 ,提高地震的定位精度。本文列举了 F- K功率谱的不同计算方法 ,并将该方法应用于上海地震台阵所记录的地震事件。对地震和地脉动的 F- K分析结果得出 ,地震的方位角和慢度值分别对记录长度的分布呈线性特征 。
The spectrum analysis of Frequency-wavenumber(F-K)is one of the traditional methods of data processing for seismic array.The available signal of earthquake can be extracted from the background of ground motion and the precision of earthquake locating can be improved by using F-K method.In this paper,we describe the different calculating methods of F-K power spectrum,which are applied to the seismic events recorded in the Shanghai Seismic Array.From the F-K analysis both of earthquake and ground motion,we obtain their azimuth and slowness,via the length of recording respectively,which show the linear distribution for earthquake but show the irregular distribution for ground motion.
出处
《地震地磁观测与研究》
2002年第2期55-64,共10页
Seismological and Geomagnetic Observation and Research
