川西北地区介质衰减特征研究  

The inversion of the inelastic coefficient of the medium in North-West of Sichuan Province

作　　者：乔慧珍[1] 张永久[2] 程万正[2] 刘杰[3] 

机构地区：[1]中国科学技术大学空间与地球科学系,中国合肥230026 [2]四川省地震局预报研究所,中国成都610041 [3]中国地震台网中心,中国北京100036

出　　处：《地震地磁观测与研究》2006年第4期1-7,共7页Seismological and Geomagnetic Observation and Research

基　　金：地震科学联合基金课题(105004);国家重点基础研究发展计划课题(2004CB418404)

摘　　要：根据成都数字地震台网8个台站记录的21个地震的波形记录,利用遗传算法,采用三段几何衰减模型拟合,得到川西北地区介质的几何衰减函数,非弹性衰减因子Q值随频率的关系为:Q(f)=334·4×f0·581,并将该文结果与其他地区计算结果进行比较和分析。The inelastic coefficient investigated according to of the medium in North-West of Sichuan Province was waveform data of 21 earthquakes recorded by 8 stations of the Chendu digital seismic net, using the genetic algorithm and three part geometrical attenuation model. The relationship between the inelastic coefficient Q（f） and the frequency we obtained is Q（f）=334.4× f 0.581. Comparing with other area＇s result, the result was discussed and analyzed.

关 键 词：介质品质因子 非弹性衰减 场地响应 川西北 

分 类 号：P315.31[天文地球—地震学]