数字化地震波形小震P波、S波震源参数对比研究  

Contrast study about the P wave and S wave hypocenter parameter of digital seismic wave

作　　者：盛菊琴[1] 宋治平[1] 赵书礼[1] 武安绪[2] 于海英[1] 

机构地区：[1]上海市地震局 [2]北京市地震局,中国北京100080

出　　处：《地震地磁观测与研究》2007年第5期116-122,共7页Seismological and Geomagnetic Observation and Research

基　　金：上海市财政专项(030203)

摘　　要：目前，国内在数字化地震资料研究中，主要应用S波来研究震源参数。本文充分利用上海数字化地震台阵（网）资料，挑选了2001～2004年华东地区发生的9个震级较大的中等地震，反演了单台记录垂直向纵波（P波）及横波（S波）震源谱，根据布龙模型，计算每个地震单台拐角频率、地震矩、零频谱值、震源破裂半径、应力降等参数，求出每个地震的震源参数（P波和S波）的平均值及其均方差，对这9个地震的P波、S波震源参数计算结果进行了对比。结果表明，用P波段数据进行震源参数的研究是可行的。Nowadays, people usually study on source parameter with digital S wave waveform data. In the paper we chose 9 moderate earthquakes recorded by Shanghai Digital Seismic Network （Array） in East China from 2001 to 2004. P wave and S wave source spectrum of vertical record of single seismic station were inversed, and parameters of single seismic station such as corner frequency, seismic moment, zero spectrum, rupture radius of seismic source, stress drop and so on were calculated by means of Brune model. Then the average and standard deviation of source parameters of each earthquake were abtained. As the same time, the P wave and S wave source parameters of the 9 moderate earthquakes were contrasted. The result shows that it is feasible to use data of P wave to calculate source parameters.

关 键 词：布龙位错模型 P波震源谱 S波震源谱 震源参数对比 

分 类 号：P315.31[天文地球—地震学]