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.