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前言近些年来,我国南北地震带及其东部地区,频繁地发生着强地震,特别是海城、唐山、松潘三次七级以上大震,给我们提供了丰富的前兆资料和宝贵的经验教训。我们必须加速认识上的深化过程,找出孕震的内在规律,尽快实现地震预报。作者在工作中,曾根据临震前井群异常的时、空分布特点,给出孕震短、临阶段地下应力调整、集中的图案,即:
Preface In recent years, strong earthquakes frequently occur in the north and south seismic zones in our country and in the eastern part of the country, especially the large earthquakes of magnitude seven or above in Haicheng, Tangshan and Songpan, which provide us with abundant precursor information and valuable experiences and lessons. We must accelerate the process of deepening our understanding, find out the inherent laws of earthquake occurrence and realize the earthquake prediction as soon as possible. In the work, according to the characteristics of the well and anomaly of the well group before the quake, the authors give the patterns of underground stress adjustment and concentration in the short gestation period and the temporary phase, namely: