大地震前的天文时间和律度残差异常以及垂线变化  

ANOMAILES OF ASTRONOMICAL TIME AND LATITUDE RESIDUAL BEFORE MAJOR EARTHQUAKE AND VERTICAL VARIATIONS

作　　者：韩延本[1] 李致森[1] 

机构地区：[1]中国科学院北京天文台

出　　处：《防灾减灾学报》1990年第2期75-81,共7页Journal of Disaster Prevention And Reduction

摘　　要：本文讨论了大地震前天文时间和纬度观测结果的短周期异常波动涨落。这种现象最先是在1976年唐山地震(M=7.8)后被发现,其后对大量观测结果进行分析更证实了它确与地震有关。对于造成这一异常波动涨落的原因,最有可能的是当地的垂线变化。垂线异常变化可能是由地下物质迁移引起的。结果显示,经典的天文观测结果不仅对于地震研究和预测是有价值的,而且对于垂线变化研究和其它的地球物理现象也是有意义的。The short-period anomalous fluctuations of observations of astronomical time and latitude before major earthquakes were discussed. The phenomenon was found firstly after Tang-shan Earthquake(M=7.8) occurred in China in 1976, and it was confirmed by more analytic results of a great number of observations and related earthquakes thereafter. The local vertical variation possibly is the main reason for the anomalous fluctuations. And the vertical anomalous variation may be caused by the removal of the underground mass.The results showed that the classical astrometric observations will be not only valuable for the study of seisms and their predictions, but also significant for research of vertical line variations and other related geophysical phenomena.

关 键 词：时间和纬度 震前的 地震研究 律度 地球物理 LATITUDE instrument 物质迁移 唐山地震 GRAVITATIONAL 

分 类 号：P315[天文地球—地震学]