Local Geomagnetic index (LDi) for 2014 at different locations

This local geomagnetic index indicates the perturbation of the geomagnetic field (horizontal component) for several locations. It is a measure of the external to the Earth irregular geomagnetic variations. It is obtained after removing a baseline and the daily regular variation from observed measurements.
See also Files description.

本局部地磁指数（local geomagnetic index）可表征多个观测点位的地磁场（geomagnetic field）水平分量扰动情况，是衡量地球外部非规则地磁变化的指标。该指数通过对观测数据去除基线与每日常规变化分量后计算得到。详见文件说明。