引言所谓地球潮汐是由月亮和太阳的引力引起的地球周期性的弹性形变现象。因地球潮汐使地球内部产生103~104Pa数量级的应力变化,其程度相当于地震时应力下降量的10-3。很难认为地球潮汐就是引起地震的直接原因,但是其变化率之大,有时构造应力的积累速度甚至上升到2位数。构造应 INTRODUCTION The so-called Earth tide is a cyclical elastic deformation of the Earth caused by the gravitation of the moon and the sun. Due to the tide of the earth, there is a stress change of the order of 103~104 Pa inside the earth, which is equivalent to 10-3 of the stress drop during the earthquake. It is hard to think that the Earth’s tide is the direct cause of earthquakes, but the rate of change is so great that the tectonic stress sometimes rises even to 2 digits. Construction should be