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利用布设在唐山滦县震区３０ｋｍ×４０ｋｍ范围内的由８８台数字和模拟地震仪组成的临时台阵，接收来自不同方向６个炮点激发产生的莫霍界面反射波走时，重建了台阵下１—９ｋｍ深度的Ｐ，Ｓ波速度和Ｖｐ／Ｖｓ图像．结果表明。中、上地壳结构存在明显的横向不均匀性．北北东走向的滦县—卢龙断裂自地表向下至少延伸到８ｋｍ深度处，并向北西方向倾斜．中、上地壳存在着近东西向的低速异常条带．这两组构造控制着该区的地震活动．
Using the temporary array of 88 digital and analog seismographs located in the 30km × 40km seismic zone of Luanxian, Tangshan, the Moho reflection wave traveling time of 6 shots in different directions was received and the array of the array was reconstructed P, S wave velocities and Vp / Vs images at a depth of 1 to 9 km. The results show. Middle and upper crustal structures have obvious lateral inhomogeneities. The Luanxian-Lulong fault north-northeastward extends from the surface to at least 8km in depth and slopes northwestward. In the middle and upper crust there is a near-east-west low-velocity anomaly belt. These two groups of structures control the seismic activity in this area.