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处在复盖层较厚的平原地区和人口稠密的大城市附近的地震区,如我国华北地区,由于地面人工振动干扰较大,很难在地面进行微震活动的观测研究。为减小干扰,近年来逐步开展了井下地震观测研究,目前已发展成为地震学的一个分支“深井地震学”。深井地震观测研究从开始到现在已有20多年历史。最早为侦察地下核爆炸,美国人建立了世界上第一个台阵(LASA)。在这个台阵中
In the thick cover of the plains and densely populated megalopolis near the earthquake area, such as our country in North China, due to the interference of ground artificial vibration is large, it is difficult to observe the microseismic activity in the ground. In order to reduce the interference, the underground seismic observation research has been gradually carried out in recent years, and now it has developed into a branch of seismology, “deep seismology”. Deep well seismic observation research has been more than 20 years from the beginning to the present. The earliest detection of underground nuclear explosions, the Americans established the world’s first array (LASA). In this array