大地震是对现代文明威胁最为严重的一种天灾。近一二十年来,一些多震国家虽对它的监测与预报倾注了不小的力气加以研究,也积累了不少资料,但真正有价值的东西还不多。目前,人类距离有效预报强震的目标还比较遥远,有待于付出更大努力。关键的问题是寻求更好的强震前兆信息。地球自转与地震活动的关系早已为人所关注。地球自转的研究,已经发展成为联结与沟通天文学与地学的一门边缘学科,其内容日臻深入与丰富。时间(世界时)与纬度的变化(即极移),决定了地球自 Earthquake is the most serious threat to modern civilization, a natural disaster. In the past decade or two, some earthquake-prone countries have studied a great deal about its monitoring and forecasting and have accumulated a lot of information. However, there are not many things of real value. At present, the target of effective prediction of strong earthquakes from mankind is still far away, and much more needs to be done. The key issue is to seek better precursors for strong earthquakes. The relationship between Earth’s rotation and earthquake activity has long been of concern. The study of Earth’s rotation has developed into an edge discipline that links and communicates astronomy and geosciences, and its content is deepening and enriching. The change in time (world time) and latitude (ie, polar displacement) determines the Earth’s own self