北部湾6．1、6．2级地震前地磁、气象异常初析
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摘要
探讨了北部湾地震前地磁和气象的异常现象，初步结果表明，震前几个月至数天，地磁垂直分量的相关系数ｒ值、特征线斜率Ｋ值以及Ｚ日变形态双低点位移先后出现短临异常。气象因子分析结果表明，年雨量一阶差分大于４００ｍｍ可作为５级以上地震的年度预报参考指标。震前数月，－３．２ｍ的地温年变形态出现畸变。
The anomalous phenomenons associated with the geomagnetism and meteorologic before Beibuwan earthquakes are discussed.The initiative result shows that some of the geomagnetic parameters were abnormal sequentially from almost half a year to several days before the earthquake,such as the gradient(K) of geomagnetic characteristic line,the correlation coefficient(r) on geomagnetic zcomponent and the displacement of "Double bottom" on day range of z-component. Meanwhile,the analySis of meteorological factors indicated that before the earthquake those had some changes,such as the precipitation and ground temperature at the depth of-3.2 meters et al.
The anomalous phenomenons associated with the geomagnetism and meteorologic before Beibuwan earthquakes are discussed.The initiative result shows that some of the geomagnetic parameters were abnormal sequentially from almost half a year to several days before the earthquake,such as the gradient(K) of geomagnetic characteristic line,the correlation coefficient(r) on geomagnetic zcomponent and the displacement of "Double bottom" on day range of z-component. Meanwhile,the analySis of meteorological factors indicated that before the earthquake those had some changes,such as the precipitation and ground temperature at the depth of-3.2 meters et al.
引文
1徐文耀．地球深部电性变化及相变机制．西北地震学报，1980，2（3）：97～1002吴德珍．地磁“特征线法”在地震短期预报中的应用．西北地震学报，1980，2（3）：101～1043吴德珍．地磁特征线的预报指标及其效能．华北地震科学，1990，8（4）：99～1084胡久常，等．海南东方震群的前兆异常及序列特征．华南地震，1996，16（1）：25～305李海华，等．气象与地震．北京：地震出版社，1976．
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