摘要
本文利用天文观测的日长变化时间序列和我国地震资料，统计分析了地球自转十年尺度变化、年标变化和季节性变化与中国大陆地震活动间的相关性。结果表明，中国大陆地震活动与地球自转变化在时间尺度上存在着一定的全局性联系，地球自转变化引起的附加应力可能对中国大陆地震活动起一定的触发作用。中国大陆地震活动与地球自转变化在空间尺度上存在着一定的地区性联系，以东西向的天山地震带与日长变化的相关性最为显著，南北向的中轴地震带和东西向的燕山地震带次之，而北北东向的山西地震带跟日长变化则没有确定的对应关系。分析结果表明，天文观测的地球自转资料可以为我国大陆地震预报提供一种参考依据。
On the basis of the observational series of the variations of the length of day (LOD) and the earthquake data in China, the relation of the deeadal, inferannual and seasonal changes in the Earth rotation with the seismic activity in China mainland was analysed statistically in this paper. The related results were then examined by the X2 test of non-random evetit. The preliminary conclusions are as follows:1. It is shown from the overall correlation between the LOD changes on time scales and the seismic activity that the stress caused by the variations of Earth rotation might trigger the seismic activity in China mainland.2. There is the regional correlation between the LOD changes with different time scales and the seismic activities in different seismic belts in China mainland. The regional relation might be concerned with the factors of the direction, the stress field etc. in different seismic belts.3. According to the results of the correlation between the LOD changes and the seismic activity mentioned above, the observational data of Earth rotation might provide a referential basis for the prediction of the seismic activity in China.
出处
《中国科学院上海天文台年刊》
1994年第15期1-14,共14页
Annals Shanghai Astronomical Observatory Chinese Academy of Sciences
基金
国家八五重大关键性基础研究项目
国家自然科学基金
