Study on the Phenomenon of Geomagnet

Study on the Phenomenon of Geomagnetic Low-value Displacement before Moderately Strong Earthquakes in Gansu

This paper analyzes the distribution characteristics of geomagnetic low-value displacement in Gansu and its adjacent areas from 1995 to 2003 on the basis of the data of the daily amplitude minimum value time of the geomagnetic vertical component. It is shown that in addition to the changing rules of geomagnetic low-value displacement itself, there is a better correlation between geomagnetic low-value displacement and the occurrence of moderately strong earthquakes. There appeared to be geomagnetic low-value displacement before the moderately strong earthquakes in Gansu in the 9 years from 1995 to 2003. This result indicates that geomagnetic low-value displacement is of instructive significance for earthquake prediction to some extents.

作 者： Zhang Suping Feng Jiangang   作者单位： Lanzhou Institute of Seismology, CEA, Lanzhou 730000, China  刊 名： 中国地震研究（英文版）  英文刊名： EARTHQUAKE RESEARCH IN CHINA  年，卷(期)： 2009 23(2)  分类号： P3  关键词： Gansu   Geomagnetic vertical component   Geomagnetic low-value displacement   Moderately strong earthquake  

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