利用黑龙江及邻近地区地磁场总强度日变化极小值时间资料，分析了2008 ～ 2011年黑龙江及邻区4 次中强地震前地磁“低点时间”在空间上的分布异常特征，发现地磁“低点位移”现象的某些特征类型与该地区中强地震活动存在一定相关性。通过对震前各种分布特征类型的分析，讨论了地磁“低点位移”产生机制，认为地磁“低点位移”对黑龙江及邻区地震活动的短临预测有一定参考价值。

Using the geomagnetic total intensity daily variation in minimum time ( low point time) information， we analyzed the geomagnetic low-point displacement phenomenon before 4 moderately strong earthquakes in Heilongjiang and its adjacent areas during 2008 ～ 2011，and discussed the phenomenon mechanisms． The preliminary results showed that the low-point displacement phenomenon and the occurrence of moderately strong earthquakes in this region have a certain relevance and has some reference value on short-term and impending-earthquake prediction in Heilongjiang Province and its adjacent areas．

中国地震局地震科技星火计划项目(XH12015Y)、黑龙江省自然科学基金项目(200906)联合资助