摘要
本文对利用强震近场加速度记录确定时,空、强三个完整的震源参数。文中给出一种利用计算机自动识别地震记录的P波初动到时和S波震相到时的算法,根据新近发表的Wood-Anderson地震仪器的最新参数,修正唐山地区量规函数。利用唐山数字强震观测台阵得到的近场加速度数据,计算了10次地震的震源位置和震级,并对定位误差进行了综合分析,将强震台网测定的震源参数与地震台网给出的震源参数相比较,从总体上看是一致的。用近场加速度记录得到震中位置更接近实际的断层,采用P波初动到时并结合使用强震记录的S_P数据,可以得到较好的定位结果。
The objective of this paper is to investigate the determination of the origin time source coordinates and magnitude of a local earthquake using near- field strong - motion accelerograms. The paper provides a method for personal computers automatically detecting P wave arrivals and S wave arrivals on seismic traces and revises the calibration function of Tangshan region based on the Wood - Anderson seismogragh parameters published recently. The epicenters and magnitudes of 10 earthquakes are determined using the accelerograms obtained by a strong - motion digital accelerograph array in Tangshan region. After synthetically analyzing the errors of earthquake-locating results it is shown that favorable results can be obtained by using P arrivals and S- P intervals of strong motion records together. Comparing earthquake - source parameters with those provided by seismic networks the results of the both show few differences in general and the epicenters which are located by the strong - motion data are adjacent to the causative defaults.
出处
《地震工程与工程振动》
CSCD
北大核心
1998年第4期15-22,共8页
Earthquake Engineering and Engineering Dynamics
关键词
近场加速度记录
震源参数
自动识别
地震
near-field accelerogram, local - earthquake parameters, automatically-detected arrivals