北京地区中小地震震源参数反演  

INVERSION OF SOURCE PARAMETERS FOR MODERATE AND SMALL EARTHQUAKES IN BEIJING REGION

作　　者：兰从欣[1] 刘杰[2] 郑斯华[2] 马士振[1] 李菊珍[1] 

机构地区：[1]北京市地震局,中国北京100080 [2]中国地震局地震预测研究所,中国北京100036

出　　处：《地震学报》2005年第5期498-507,共10页Acta Seismologica Sinica

基　　金：中国地震局地震预测研究所数字化地震波实验室;国家"十五"地震预报科技攻关课题(02-03-04);地震科学联合基金(604022);北京市自然科学基金(8022009)共同资助.

摘　　要：利用2001年10月—2004年10月该台网记录到的511条波形资料,分别以北京及附近地区、北京西部山区和东部平原区作为研究区域,采用Atkinson和Mereu方法计算各自的Q值,并与已有的结果进行对比,讨论了Q值计算结果的可靠性及差异存在的原因.在此基础上,利用Moya等方法进行了震源参数和场地响应的反演,计算时采用了两种模型①分区的Q值、地震和台站;②全区的Q值、地震和台站.结果表明,两种模型得到的震源参数和场地响应基本一致,同时也说明了采用这些方法得到的震源参数不受台网大小的限制.In the paper, 511 waveform data recorded by the network from Oct. 2001 to Oct. 2004 are used in the researches for the entire Beijing region, the western mountainous region and the eastern plain area, respectively. The Q values are calculated for each area by Atkinson＇s method and compared with the existed data. The reliability of the Q values and the reasons for the difference in the Q values are also discussed. Then, the source parameters and site response are inverted by the Moya＇s method, in which two models are used. The first model uses the Q values, earthquakes and stations in the sub-areas and the second model uses the Q values, earthquakes and stations in the entire Beijing region. The results indicate that the source parameters and site responses obtained by two models are basically consistent with each other. It also indicates that the source parameters obtained by these methods are not affected by the size of station network.

关 键 词：震源参数 场地响应 品质因子 Q值 地震台网 

分 类 号：P315.33[天文地球—地震学]