【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.更多还原

【Abstract】 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.更多还原