南天山西段及交汇区介质品质因子Q值特征研究  

RESEARCH ON QUALITY FACTOR Q OF SMALL AND MODERATE EARTHQUAKES IN THE WESTERN PART OF THE SOUTHERN TIANSHAN

作　　者：阿衣仙姑.买买提 尼鲁帕尔.买买吐孙 祖丽皮亚.巴克 夏爱国[2] 姜圆[1] 

机构地区：[1]新疆维吾尔自治区地震局喀什基准地震台,新疆喀什844000 [2]新疆维吾尔自治区地震局,新疆乌鲁木齐830011

出　　处：《高原地震》2015年第1期23-30,共8页Plateau Earthquake Research

基　　金：新疆地震科学基金(2013201)

摘　　要：利用2009~2013年间新疆数字地震台网中12个地震台所记录的34个地震事件的数字地震波形资料,以南天山西段及交汇区作为研究区,采用3段几何衰减模型及Atkinson联合反演方法对地震波形资料进行非弹性衰减研究,得出介质品质因子Q（f）与频率的关系：Q（f）=337f0.577。为验证不同时段的地震事件对Q（f）计算结果是否有影响,将上述研究中2009年发生的前24个事件保持不变,对后10个事件做3次更换研究,分别得到介质品质因子Q（f）与频率的关系：Q（f）=329f0.565;Q（f）=324f0.520;Q（f）=363f0.526。结果表明不同时段内的地震事件对Q（f）值的影响不大,采用Atkinson联合反演方法计算介质品质因子Q（f）较为稳定、可靠。Accordng to the data of Xinjiang Digital Seismograph Network 12 seismic stations in 2009 to 2013, the inelastic attenuation Q （f） of seismic waveform data are calculated by three segments geometric attenuation model and Atkinson joint inversion in south western Tianshan region, the relationship between the quality factor of the medium and the frequency of the Q （f） is estimated as：Q （f） = 337f0.577. In order to verify the result, the former of 24 seismic events in 2009 remain unchanged, the later 10 events were recalculated three times, and the results are： Q （f） = 329f 0.565, Q （f） = 324f 0.520, Q （f） = 363f 0.526. The results show that seismic events in different time range is not effected to the calculation results, and the Atkinson joint inversion method is rela- tively stable, the calculation results are reliable.

关 键 词：南天山 非弹性衰减 介质品质因子 

分 类 号：P315.31[天文地球—地震学]