震后趋势判断中尾波振幅衰减特征k值的研究  

Study on coefficient k-value of characteristic of coda wave attenuation in shock tendency estimation

作　　者：张帆[1] 姚立玽 张震峰 

机构地区：[1]中国科学技术大学地球和空间科学学院,中国合肥230026 [2]浙江省地震局,中国杭州310013

出　　处：《地震地磁观测与研究》2005年第4期36-44,共9页Seismological and Geomagnetic Observation and Research

基　　金：浙江省科技厅重点项目(991103263)

摘　　要：利用唐山、浑源、岫岩和浙江省的鄞县、珊溪水库地震等不同地震类型的数字地震波资料,经过筛选和整理,对每一个地震序列求出几个台站的尾波振幅衰减特征,k值随时间序列的变化特征。结果表明,虽然k值的变化趋势比较复杂,但还是发现不同震型的k值的变化特征有所不同。从趋势上来说,在主震前后,主震-余震型地震的k值显示先低后高的趋势,震群型地震显示先高后低的趋势。我们可以根据这个特征来判断所发生地震的震型,用于震后地震趋势快速判断。The digital earthquake wave data of several stations from different type earthquake sequence of Tangshan, Hunyuan, Xiuyan, Yinxian and Shanxi reservoir had been obtained and worked out attenuation coefficient k - value of coda wave amplitude, k - value＇s variation with time indicates that although the variation is very complicated, but different type earthquake sequence has different variation characteristics. Before and after main shock, k - value for mainshock- aftershock type shows low level in earlier and high level in later, but show counter for cluster type. This characteristic can be used to judge the type of earthquake and estimate shock tendency.

关 键 词：地震序列 尾波 衰减特征 震后趋势判断 

分 类 号：P315.31[天文地球—地震学]