所谓地壳变动,是指由于地球深部经常起作用的力,以及太阳、月亮对地球的引力等引起岩石变形的现象,在地表上是以地面的伸缩、倾斜(隆起和下沉)变动形式表现出来的。虽然在目前对其变化的原因尚不清楚,但大震前出现的一些显著变化,在古代文字记载和现代的精密观测结果中均已屡见不鲜。地下 The so-called changes in the earth’s crust, refers to the Earth’s deep and often play a role in the force, and the sun, the moon on the Earth’s gravity and other rock deformation caused by the phenomenon of the ground on the ground stretching, tilting (uplift and sink) changes in the form of. Although the reasons for its change are not clear at present, some notable changes that occurred before the Great Earthquake have been commonplace both in ancient textual records and in modern precision observations. underground