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利用近场加速度记录确定近震震源参数的研究

DETERMINATION OF LOCAL-EARTHQUAKE PARAMETERS USING NEAR-FIELD STRONG-MOTION ACCELEROGRAMS
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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
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参考文献2

  • 1李沙白,强震观测学术研讨会论文集,1994年
  • 2Peng Kezhong,Phys Earth Planet Inter,1985年,38卷,92页

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