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Earthquake precursors detected by astronomical observations
作者姓名:张国栋  韩延本  赵复垣
作者单位:ZHANG Guo-dong ( HAN Yan-ben ( ZHAO Fu-yuan National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012,China
基金项目:State Natural Science Foundation of China (19973011).
摘    要:Introduction Some earthquake precursors can be obtained by analyzing the local vertical variation through monitoring the residual anomalies of both universal time and latitude obtained by astrometric observations, and such a view has been verified by different earthquakes (LI, et al, 1978; HAN, 1993). The deviation and increment of local plumb line are possibly caused by the change of direction of gravity acceleration that aroused by ground mass activities before earthquakes. The other part …

收稿时间:20 September 2000
修稿时间:18 December 2001

Earthquake precursors detected by astronomical observations
Zhang Guo-dong , Han Yan-ben and Zhao Fu-yuan.Earthquake precursors detected by astronomical observations[J].Acta Seismologica Sinica(English Edition),2002,15(1):82-89.
Authors:Zhang Guo-dong  Han Yan-ben and Zhao Fu-yuan
Institution:National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
Abstract:It has been primarily confirmed that before the occurrence of a middle or major earthquake, anomalies in the residuals of universal time and latitude measurements obtained by astrometric observations may appear. We investigate the relation between the residual anomalies and the three key factors of an earthquake. To build a network of observational sites so as to obtain data of residuals of universal time and latitude from multi-instruments would be of certain significance for determining three key factors of an earthquake, especially for positioning epicenter. The data from multi-instruments would also be valuable for studies of the variation of the vertical. It is proposed to manufacture potable and high-accuracy astrometric instruments and to build observational network to obtain anomalies of universal time and latitude in the regions with high earthquake uprising possibilities.
Keywords:residuals of universal time and latitude  variation of vertical  earthquake precursors
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