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罗马尼亚Ｖｒａｎｃｅａ地震区是大陆上发生与板块碰撞和削减有关的中深源地震活动的地区之一。本文介绍了应用地震层析成象方法研究该地区深部速度结构的成果。在研究中使用了地方和区域地震台所记录的４３３个浅源和中深源地震的到时资料来反演求解深至２００ｋｍ的三维速度结构。在走时和射线路径的计算中利用了有效的三维射线跟踪技术，在反演中采用了ＬＳＱＲ算法。高分辨率的地震层析图象揭示了速度结构的广泛不均匀性。结果表明，地震层析成象技术是研究大陆地球动力学的有力工具。
The Vrancea earthquake area in Romania is one of the areas on the mainland where moderate-deep seismic activity related to plate collision and reduction occurred. This paper presents the results of applying seismic tomography to the study of deep velocity structures in the area. In the study, the arrival time data of 433 shallow and middle-deep earthquakes recorded by local and regional seismostats were used to inversely solve the three-dimensional velocity structure up to 200 km in length. The effective three-dimensional ray tracing technique is used in the calculation of traveltime and ray paths, and the LSQR algorithm is used in the inversion. Seismic tomographic images of high resolution reveal a wide range of inhomogeneities in velocity structure. The results show that seismic tomography is a powerful tool for studying the geodynamics of the continent.