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采用2002年—2012年首都圈台网事件目录和2008年12月—2011年11月中国地质科学院地质力学研究所布设的微震台网记录的地震事件目录,分别运用结合波形互相关的双差定位和Geiger定位方法进行精确定位,对北京西北地区的活动地震构造进行了研究。结果表明北京西北地区分布两条NW向地震断裂带和两条NE向地震断裂带及两个地震密集分布区,地震活动密集分布区均位于NE向地震断裂带与NW向地震断裂带相交处及地处山区平原过渡区,可能是东北旺断裂与南口—山前断裂活动的反映。该地区地震震源深度分布范围主要为5～30km,主要分布在上地壳和中地壳。
The catalog of seismic events recorded by the metropolitan circle network in 2002-2012 and the microseismic network recorded by the Institute of Geomechanics of the Chinese Academy of Geological Sciences from December 2008 to November 2011 were respectively analyzed by using the double difference positioning And Geiger positioning method for precise positioning of seismic activity in the northwestern area of Beijing has been studied. The results show that there are two NW-trending seismic fault zones and two NE-trending seismic fault zones and two seismic-intensive distribution areas in the northwestern Beijing area, and the dense seismic activity distribution areas are located at the intersection of the NE-trending seismic fault zone and NW-trending seismic fault zone and It is located in the transitional area of mountain plain and may be a reflection of the northeast-wang fault and the south-front piedmont fault activity. The focal depth of the earthquakes in this area is mainly distributed in the range of 5 ~ 30km, mainly distributed in the upper crust and the middle crust.