山东地区地壳速度与中强地震的关系  

The relationship between the crustal velocity and moderate to strong earthquakes in Shandong area

作　　者：林眉[1] 郑建常[1] 李霞[1] 

机构地区：[1]山东省地震局,中国济南250014

出　　处：《地震地磁观测与研究》2014年第3期51-56,共6页Seismological and Geomagnetic Observation and Research

基　　金：山东省自然科学基金项目(ZR2012DQ006)

摘　　要：利用山东区域地震数字台网提供的数据,通过三维层析成像方法结合山东地质构造实际情况,对山东区域进行联合走时反演地壳速度结构,获得该区分辨率较高的三维速度结构图像。结果表明:不同深度上的速度分布反映出山东地区深部构造的某些重要信息,为进一步研究该区的活动构造及地震参数计算提供科学依据。在地壳速度结构与中强地震活动的关系上,再次显示出中强震多发生在速度结构高速单元与低速单元的过渡带附近,说明中强震的孕育与震源区周围介质的不均匀性有关。In this paper using inversion technique about combined travel-time of seismic waves on the data recorded by Shandong regional seismic station network,and the actual situation of geological structures in Shandong Province,tomography research in the area is discussed.The work has shown that：the velocity distribution at different depths reflects the deep structure in Shandong.It provides some important information for further research of active tectonics and the basis of scientific calculation of earthquake parameter.The relationship between the strength of crustal structure and the shows again that the strong earthquake occurred near the transition zone of highter and lowerthe velocity units,indicating that the gestation of strong earthquake is relate to the medium heterogeneity of source region.

关 键 词：地震波层析成像 地壳上地幔 郯庐断裂带 三维结构 

分 类 号：P315.2[天文地球—地震学]