本文通过近几年来震前地壳表层钻孔应变异常显示的几个特例,试图说明地震前在震源区及其相当大范围内存在着“地壳应变场”的异常。“异常应变场”的应变量级一般在10~(-7)以下。其衰减程度因介质条件而有很大差异。因此,通过灵敏度足够高的观测系统(10~(-9)以上),有可能获得震前应变信息,从而探索出一条地震短临预报研究途径。 This paper attempts to illustrate the “crustal strain field” anomaly existing in the source area and its considerable area before the earthquake, according to several specific examples of borehole strain abnormalities in the crust before the earthquake in recent years. The magnitude of the “abnormal strain field” is generally below 10 -7. The degree of attenuation due to media conditions and have very different. Therefore, it is possible to obtain pre-earthquake strain information through a sufficiently sensitive observation system (above 10-9) to explore a research approach to short-term and short-term earthquake prediction.