【摘要】 应用黑龙江、吉林、内蒙古和辽宁等省的地磁总场强度F北京时21点绝对观测值,研究了其空间相关性在东北地区几次中等地震前的变化。结果显示,在这些地震前地磁总场F的空间相关性会出现下降变化,本文初步给出了判定异常的指标。更多还原

【Abstract】 Using the 21 O’clock F component observation data of geomagnetic stations in Heilongjiang,Jilin,Inner Mongolia and Liaoning provinces,the paper researches the changes of spatial correlation before several medium earthquakes and finds that the spatial correlation would decline.We provide the preliminary index for abnormality judgment for the guidance of short-term earthquake forecast in the region.更多还原