京津唐地区中上地壳三维P波速度结构  

THREE-DIMENSIONAL P WAVE VELOCITY STRUCTURE IN BEIJING-TIANJIN-TANGSHAN AREA

作　　者：于湘伟[1] 陈运泰[1] 王培德[1] 

机构地区：[1]中国地震局地球物理研究所,中国北京100081

出　　处：《地震学报》2003年第1期1-14,共14页Acta Seismologica Sinica

基　　金：国家科技部攀登项目<东亚大陆地球动力学研究>(95-S-05)"地壳运动和强震发生的动力机制"(95-S-05-03)课题资助. 中国地震局地球物理研究所论著02AC1027.

摘　　要：根据华北遥测台网和延庆-怀来数字地震台网记录的京津唐地区(113.5～119.5E,38.0 ～41.5N)1992～1999年共16 048条P波首波到时资料,利用近震层析成像方法反演了该地区中、上地壳三维P波速度结构,并用所得到的地震波三维P波速度模型同时得到了震级ML1.7～6.2的1 132次地震的精确震源参数.反演结果揭示了京津唐地区地震P波速度结构明显的横向不均匀性.A detail three-dimensional P wave velocity structure of Beijing-Tianjin-Tangshan area (BTT area) was inverted by using the data from local seismic networks. 16 048 P wave first arrivals from 16048 earthquakes which occurred in the upper and mid-crust in and around BTT area during 1992 to 1999. The first arrival times are recorded by Northern China Telemetered Seismic Network and Yanqing-Huailai Digital Seismic Network. Hypocentral parameters of 1132 earthquakes with ML1.7～6.2 and three-dimensional P wave velocity structure were determined simultaneously. The inversion result reveals the lateral hetergeneities of the P wave velocity structure around BTT area.

关 键 词：京津唐地区 华北遥测台网 数字地震台网 P波速度结构 上地壳 震级 震源参数 地震层析成像 三维速度结构 地震活动性 

分 类 号：P315.3[天文地球—地震学]