地磁低点位移现象及其与地震的关系
GEOMAGNETIC LOW-POINT DISPLACEMENT PHENOMENA AND THEIR RELATION TO EARTHQUAKES
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摘要: 本文用中国地磁台网多年的资料,研究了地磁垂直分量日变极小值出现的时间(低点时间)在空间分布的异常特征,即低点位移现象。这种少见的地磁异常现象与地震的发生有较好的相关性,其发震日期为异常日以后的第27天或41天前后4天,发震地区在低点位移突变分界线附近。低点位移是一种复杂的地球物理现象,受多种因素影响,其机制仍处在探索阶段。Abstract: On the basis of data recorded for many years by the network of geomagnetic observatories in China, the anomalous features of appearance time of the minima of diurnal variations (i.e. low-point time) of the geomagnetic vertical component and the variation of their spatial distribution (i e. phenomena of low-point displacement) have been studied. Such rare phenomena of geomagnetic anomalies are an objective reality, being well-correlated with the occurrence of earthquakes. It has been found that most earthquakes occur in the vicinity of the boundary line of sudden change of the low-point displacement and generally within four days before or after the 27th or 41st day counting from the day of appearance of the anomaly.The low-point displacement is one of the complicated geophysical phenomena which is affected by many factors and its mechanism is still under study.
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[1] 丁鉴海、黄雪香,变化磁场及其跨越式预报方法,西北地震学报,1981,3,4,26.
[2] 丁鉴海、黄雪香,青海6.8级地震的地磁异常,地震,1981,5:9.
[3] 丁鉴海、黄雪香、张淑兰,南黄海勿南沙6.2级地震前的地磁异常,西北地震学报,1985,7,3,104——105,
[4] 徐文耀,磁层电场引起的Sq "低点位移”,地震地磁观侧与研究,1985,6,1,8——12.
[5] M.巴特著,郑治真译,地球物理学中的谱分析,287,1978,地震出版社.[1] 丁鉴海、黄雪香,变化磁场及其跨越式预报方法,西北地震学报,1981,3,4,26.
[2] 丁鉴海、黄雪香,青海6.8级地震的地磁异常,地震,1981,5:9.
[3] 丁鉴海、黄雪香、张淑兰,南黄海勿南沙6.2级地震前的地磁异常,西北地震学报,1985,7,3,104——105,
[4] 徐文耀,磁层电场引起的Sq "低点位移”,地震地磁观侧与研究,1985,6,1,8——12.
[5] M.巴特著,郑治真译,地球物理学中的谱分析,287,1978,地震出版社.
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