随着地球动力学和地震预报研究的深入、发展,研究地球重力场的空 间分布正逐步向研究其时间变化规律过渡。 重力场的时间变化分潮汐变化和非潮汐变化。在地球内部物理学中,潮汐变化主要用于地球弹性和粘滞性的研究,潮汐变化的规律人们已经掌握得比较充分,而摸清非潮汐变化则正是人们面临着的一个艰难课题。 With the deepening and development of geodynamics and earthquake prediction research, the study of the spatial distribution of the Earth’s gravitational field is gradually making a study of its temporal variation. The time variation of gravitational field is divided by tidal changes and non-tidal changes. In the internal physics of the Earth, the tidal changes are mainly used to study the elasticity and viscosity of the Earth. The laws of tidal changes have been mastered quite well, and finding out the non-tidal changes is a difficult task people face.